TW200935717A - Motor control device - Google Patents

Abstract

A motor control device is provided with a converter section (21) which generates a converter voltage for driving a motor section by increasing a power supply voltage, a control section (20) which changes the value of the converter voltage by drive-controlling the converter section (21), and a power supply voltage detecting section (28) for detecting the value of the power supply voltage. The control section (20) detects a change of the value of the power supply voltage, based on the value of the power supply voltage detected by a power supply voltage detecting section (28), and corresponding to the detected change quantity of the voltage of the power supply voltage, the value of the converter voltage increased by the converter section (21) is controlled.

Description

200935717 IX. Description of the invention: [Technical field to which the invention pertains] The present invention relates to a motor control device, The device control unit is a motor control unit having a converter unit that generates a converter voltage for boosting the power supply voltage to drive the motor unit. [Prior Art] 驱动 At the construction site, the driver's shoulder using the air-reducing needle machine, etc. It is necessary to provide an air-retracting machine that supplies air to the driving tool. The structure of the machine is: by driving the motor portion, compressed air is generated in the compressed air, and the generated % is determined, and the compressed tank is used to supply the compressed air to the driving tool. The structure in the oxygen-reducing machine of 5 is the control unit to control the driving amount of the motor, and the air compressor can. In the general control unit, the power of the motor control device is used by combining the converter circuit: the 2 circuit and the inverter circuit are controlled, and the driving amount of the motor portion is adjusted, and the inverter circuit is I condense air (for example, see Patent Document 1). In a fast and stable supply, the control unit 'determines the amount of control corresponding to the value of the horse stream, by controlling = number of revolutions or driving electric or inverter The circuit, which will exist in the storage: turn out to the converter circuit. The pressure of the gas is kept as a patent document f 1 : JP-A-5, 81, 973, the structure of the air compressor is, and

7042-10203-PF Eight plugs for general sockets (AC 200935717 2), by connecting the plug to the socket, receive the supply of drive power for driving the motor. In the case of using an air compressor at the operation site, since a plurality of electric workers and/or a single socket are used for connection, = this is due to the change in the number of power tools connected to the socket, the power supply to the two chaotic compressors The voltage sometimes changes rapidly. ❹ For example, the supply voltage supplied to the air compressor rises sharply. Z 'As the power supply voltage rises, the converter that is boosted by the converter circuit also rises, because the converter voltage rises and the motor rotates. The number of hearts rises and may cause motor noise. In order to reduce the generation of such motor noise, the control unit issues a control command for lowering the converter voltage to the converter circuit, but the heat is "μ &, VII, because the control unit corresponds to the motor portion = the number of revolutions In order to determine the amount of control, after the number of motores that have risen sharply is detected, the number of revolutions of the motor portion is reduced and the number of revolutions of the motor portion is reduced to reduce the converter voltage. The control of the content, the mouth, can not quickly execute the output of the control command', and the problem that the noise with the number of revolutions cannot be effectively suppressed. The other side of the motor Φ, the power supply voltage supplied to the air compressor drops sharply. : 'Because the output state of the air compressor is ensured (the power value is 疋, so that the drive current - the motor becomes lower as the power supply voltage decreases). On the other hand, the 'drive current is a specific value. In the case, the control section will be used to reduce the value of the drive current to a special: the command to lower the converter voltage, output to the conversion, n circuit, but, right-hand control Command converter such that the converter circuit on voltage abruptly

7042-10203-PF 6 200935717 鹌 升', because the converter voltage rises sharply, the drive current is drastically reduced, and as a result, the drive current is overshooted. As described above, the overshoot of the drive current is generated as described above, and the current value temporarily rises, and as the drive current rises, the interrupt function of the power source is activated, and the drive power is blocked. [Summary of the Invention]

According to one or more embodiments of the present invention, there is provided a motor control device capable of reducing a motor even when the power supply voltage is suddenly increased or decreased when the power supply is electrically boosted by the converter unit to drive the motor portion. The generation of motor noise or the rapid increase of the drive current. According to one or more embodiments of the present invention, a motor control device includes a converter 胄' generates a converter voltage for controlling a power supply voltage to drive a motor portion, and the driving portion is driven by the converter portion Control to change the value of the converter voltage; when the power supply voltage is detected, the change in the value of the power supply is detected. The control unit detects a change in the value of the power supply voltage based on the value of the power supply voltage detected by the power source (four) detecting unit, and controls the conversion according to the amount of change in the value of the detected power_ Booster: The value of the converter voltage. In the motor control device according to the above-described one embodiment of the present invention, the control unit detects a change in the value of the power supply voltage, and controls the boosting of the converter unit by the amount of change in the value of the detected power supply voltage. The converter voltage 兮 value is thus "compared with the conventional control of the converter portion in accordance with the number of revolutions of the motor portion, the present invention can quickly control the converter portion, and can

7042-10203-PF 7 200935717 The drive control of the motor unit is performed more appropriately. Further, the control unit of the motor control device described above controls the converter unit based on the value of the power source voltage detected by the voltage detecting unit when the value of the power source voltage is detected to rise rapidly. The value of the converter voltage is lowered before the number of revolutions of the portion rises. Thus, in the motor control skirt of one or more embodiments of the present invention, the controller controls the switch when the value of the detected power supply voltage rises sharply.

The converter unit lowers the value of the converter voltage before the number of revolutions of the motor unit rises. Therefore, the control can be performed such that the number of revolutions of the motor unit is lowered before the number of revolutions of the motor unit rises sharply. Therefore, even when the value of the power supply voltage rises sharply, the number of revolutions in the motor portion can be prevented from rising sharply, and the motor noise of the motor portion can be effectively suppressed as the number of revolutions increases rapidly. In addition, the control unit controls the converter unit to reduce the value of the converter voltage before the number of revolutions of the motor unit rises, and can suppress the rise of the converter voltage with the increase of the power supply voltage. It is also possible to shorten the period during which the converter voltage converges. Further, the control unit of the motor control device controls the converter unit so that the value of the power source voltage is detected to decrease sharply when the value of the power source voltage is detected by the power source voltage detecting unit. The value of the converter voltage rises slowly. As described above, in the motor control device according to the above-described embodiment of the present invention, the controller controls the converter unit so that the value of the converter voltage gradually rises when the value of the power source voltage is detected to decrease rapidly. , 7042-10203-PF 8 200935717 can suppress the converter voltage rapid change 'and can suppress the overshoot of the primary current that occurs when the converter voltage changes rapidly. According to the motor control device of one or more embodiments of the present invention, the control unit detects a change in the value of the power supply voltage, and controls the converter voltage boosted by the converter unit in accordance with the amount of change in the value of the detected power supply voltage. Therefore, the present invention can quickly control the converter portion and can reduce the generation of the motor noise of the horse portion or reduce the drive, compared to the conventional control of the converter portion in accordance with the number of revolutions of the motor portion. The current rises sharply. Other features and effects will be apparent from the description of the embodiments and the appended claims. [Embodiment] Hereinafter, a motor control unit according to the present invention will be described in detail with reference to an air compressor as an example (as a typical embodiment). Fig. 1 is a block diagram showing a schematic configuration of an air compressor. The air compressor (motor control device) 1 is basically constituted by a sump portion 2, a compressed two-gas generating portion 3, a motor portion 4, and a control circuit portion 5.

8. The pressure generated by the storage 3 has a predetermined pressure of about i~4. 3MPa

Mouth 9. In the present exemplary embodiment 9a, and the atmospheric pressure taken out for taking out the high-pressure compressed air to take out the atmospheric pressure of the compressed air, the outlet port is taken. 9b. In each

7042-10203-PF 9 200935717 The outlets 9a and 9b are respectively provided with pressure reducing valves j 〇a and 丨〇b for decompressing the compressed air obtained by the respective outlets 9a and 9b to a desired pressure. The pressure of the compressed air taken out by the pressure reducing valve i〇a is reduced to 1. 5MPa~2. 5 0MPa, the compressed air taken out by the pressure reducing valve 10b at the normal pressure take-out port 9b. The pressure is reduced to 〇7Mpa~15Mpae. The compressed air in the storage tank 8, as described above, is usually maintained at a pressure of about 3_5MPa~4. 3MPa. Therefore, taking the outlet from the high pressure "takes the compressed air of φ, And the compressed air taken out from the normal pressure take-out port 9b can be maintained at the above-mentioned desired pressure by the pressure reducing valves 10a, 10b. Further, the air pipes can be attached and detached to the respective outlets 9a and 9b ( The figure is not shown to supply compressed air decompressed by the pressure reducing valve 1 〇a, 1 〇b to a driving tool such as a nail grab. The compressed air generating portion 3 includes a configuration such that it is disposed inside the cylinder. The piston moves back and forth, compressing the air sucked into the steam red from the suction chamber of the steam rainbow, and The compressed air is supplied to the storage tank 8 of the sump portion 2 through the connecting pipe 。. The function of the motor portion 4 includes generating a driving force for moving the piston of the compressed air generating portion 3 back and forth. The motor portion 4 is provided with a stator 16 and a rotor 17 for generating a driving force. U-phase, V-phase and W-phase coils i6a, 1 and 16c are formed on the stator 16, by passing current through the coils 16a, 16b. '16c, a rotating magnetic field is generated. The rotor 17 is composed of a permanent magnet, and the rotor cymbal 7 is rotated by a rotating magnetic field formed by the current of the coils 16a, 16b, 16c of the stator. Further, the motor unit 4 is provided with a rotation number detecting portion 18 for detecting the rotation of the rotor 17 of 7042-10203-PF 10 200935717. The number-of-turns detecting unit 18 is provided with a Hall Ic, and the Hall 1C detects the change in the magnetic field of the rotor 17, thereby detecting the number of revolutions of the rotor 17. * As shown in Fig. 2, the control circuit unit 5 is basically constituted by a microprocessor (MPU, Micro Processing Unit) 2A, a converter circuit (converter unit) 21, and an inverter circuit 22.

The converter circuit 21 is substantially constituted by a rectifier circuit 24, a booster circuit 25, and a smoothing circuit 26, and the converter circuit 21 performs so-called pAM (Pulse Amplitude Modulation) control. Here, pAM is controlled by a method in which the converter circuit 21 changes the pulse height of the output voltage to control the number of revolutions of the motor unit 4. On the other hand, so-called PWM (Pulse Width Modulati) control is performed in the inverter circuit. The pWM control is a method of changing the pulse width of the output voltage to control the number of revolutions of the motor unit 4. Compared with the PWM control, the PAM control has less efficiency reduction when the motor unit 4 rotates low, and can respond to high rotation by increasing the voltage. Due to this characteristic, / is a control method mainly used for output and stable operation. . On the other hand, the PWM control is the control method mainly used at the time of starting or when the voltage is low. The microprocessor 20' corresponds to the operating state of the air compressor ,, and is appropriately switched to perform PAM control by the converter circuit 21 and inverter circuit 222 PWM control. The rectifying circuit 24 and the smoothing circuit 26 of the converter circuit 21 function to rectify the alternating current power source 29, which is a driving source of the air compression_i, into a direct current voltage. Inside the booster circuit 25, 7〇42-l〇2〇3-pF 11 200935717 = off element 25a is provided, the function of which is to perform amplitude control of the DC voltage corresponding to the micro-interval. The liter (4) command, the device 2f), the PAM 4 channel 25 ’ is controlled by the boost controller 27 that receives the microprocessor 7. Further, in the converter circuit 21 and the W (four) 2 source voltage detecting portion (supply voltage detection), the voltage value detected by the power source voltage detecting portion 28 is sighed. The value of the power supply voltage value indicates the power of the delivery source 29 for the voltage value to be boosted by the booster circuit 25 of the conversion circuit 21 or the like before the voltage is boosted (hereinafter referred to as the power supply voltage by e ❹). value. Therefore, the change in the power supply voltage supplied from the AC power supply 29 can be detected by detecting the value = in the power supply voltage detecting portion 28. The voltage value detected by the power source voltage detecting unit 28 is output to the microprocessor 2A. On the other hand, the power source current detecting unit 3 is used. The detected current value is a value of the primary current (drive current) supplied from the AC power supply 29, and the primary current supplied from the AC power supply 29 can be detected by detecting the voltage value in the power supply current detecting unit 3G. Variety. The current value detected by the power source current detecting unit 30 is output to the microprocessor 2A. The inverter circuit 22' performs positive and negative conversion on the pulse of the DC voltage converted by the converter circuit 21 at a certain period, and has a function of converting the DC voltage into an AC voltage having a pseudo sine wave by changing the pulse width. . By the adjustment of the pulse width, the number of revolutions of the motor portion 4 can be controlled as described above. The microprocessor 2 控制 controls the amount of driving of the motor unit 4 by adjusting the output value of the inverter circuit μ. Further, a converter voltage detecting portion 31 is provided between the inverter circuit 22 and the converter circuit 21. The power detected by the converter voltage detection 胄31

7042-10203-PF 200935717 The value of the voltage is expressed by the boost circuit 25, etc. (4) (the voltage after the voltage is boosted (hereinafter, this electric voltage) is called the converter voltage). Therefore, by the converter The electromigration detecting unit 31 detects the power supply voltage after the boosting (the current voltage is sufficient to detect the change in the voltage value supplied to the motor unit 4 by the detecting unit. The value of the electric power detected by the conversion two = the output unit 31 is rotated to The microprocessor 2〇, ❹ 微处理器 The microprocessor 2 is configured to perform the drive control of the converter circuit core inverter: the road 22 to control the compressed air of the hall 2 is ~ 4. Hall The control unit: the microprocessor 20 is configured to use the temporary RAM as the working memory, and the (5) > formula for storing the control area described later (for example, the third figure described later and The relevant program of the processing of the figure) or the post-age Β τ n processing operation (for example, the judgment described later, whether it has passed 400 hearts, etc., etc., from the single-chip U^. Ten (four) industry), etc. . Furthermore, the microprocessor 20, depending on the timing of the ROM stored in the ROM, is sufficient to perform the timing determination process. In the microprocessor 20, the number of revolutions (information on the number of revolutions of the drive port) of the motor unit 4 such as μ, +, and (4) is outputted (more specifically, the number of revolutions detected by the circuit is the rotor 17), and The power supply voltage value detected by the lightning and shield power supply voltage detection unit 28 (the information of the voltage value of the parent current power supply 29), the power supply current detection unit, and the secondary current value ( The information of the current value of the AC power source 29) is converted to the value of the converter voltage detected by the voltage detecting unit 31 (supply voltage value supplied to the horse 卩4). The 9 Φ #processor 20 is ligated to output control information (ρΑΜ command, command) to the converter circuit 1 and the inverter circuit 22.

7〇42'l〇2〇3-PF 13 200935717 is the control information (PAM command, pffM command) outputted by the converter circuit 21 and the inverter circuit 22 of the motor unit 4 in accordance with the microprocessor 2〇. Drive control. The H2G is micro-processed by the PAM command to the boost controller. The switching element 25a of the booster circuit 25 is controlled by the dust controller 27 to control the drive control of the converter circuit 21. Further, similarly, the microprocessor 执行 2 executes the control of the path 22 by outputting the simple command to the inverter circuit 22. However, as described above, the PAM control is a control method mainly used at the time of high output and stable operation, and is newly controlled to be a control method mainly used at the time of starting or when the voltage is low. Therefore, the microprocessor 2G, when the air compressor is turned on, boosts the power supply voltage (-sub-voltage) to a predetermined voltage value, and the output of the inverter circuit 22 (Duty, load value) is slow. Slowly increase to 1〇〇% 'by this' to execute the air compressor! Control of the drive state of the (motor unit 4). Further, the control method of the motor unit 4 with the output value of the converter circuit reaching 1% is controlled by the PWM control to the pAM control, and the control of the stable motor unit 4 is performed by the pAM control. Then, after the control of the motor unit 4 is completely moved to the PM control (that is, in the state of the so-called full pAM (four) control = control), the electric house value (supply voltage (primary voltage)) of the AC power source 29 rises and falls. In the case of the microprocessor 2, the processing of the microprocessor 2B will be described. [Case where the voltage value of the AC power source rises sharply] Fig. 3 is a flowchart showing the control process of the microprocessor 20 when the voltage value of the AC power source 29 rises sharply.

7042-10203-PF 200935717 First: The microprocessor 20, according to the presence of the museum, judges the time from the previous time to obtain the power of the power supply. The time is over 400 " sec (step ς. 疋 No already by the town (Step S. 1). Micro-processing 400 usee λ, ^ 20, in the case of judging the time of sec (in the case of the step), repeatedly perform the situation in step 1.1, step S·1 In the case where the arbitrage has passed the time of 400 "sec (in the case of the step), the microprocessor 2 〇 _ _ _ the detecting unit 28 gives φ ❹ Ο the power supply voltage and records (Storage) is detected in the RAM T 28 in the J饤疋Ihe field (step S 2). Following the 'microprocessor 20, the judgment is. The smudged county is the most power source in the special time. j value two 3) 'When it is not the most value of the power supply voltage at a specific time (in the case of NO in step S3), the timing determination processing of the U-home is performed. On the other hand, 'in the case of a small t value of electricity at a specific time (in the case of step S.3), the microprocessor 20's the average value of the peaks within a certain time, for example, up to three The first one is excluded and the second and third peaks are equalized as the peak average value of the power supply voltage (step S4). Following the 'microprocessor 20, the peak average value of the previous-time power supply voltage ((4) S. 5) is read (taken) in a specific area of the _, using the read previous power supply voltage The peak average value is determined whether or not the remainder obtained by subtracting the peak average value of the power supply voltage calculated from the previous time from the peak average value of the power supply voltage that is once applied is equal to or greater than the peak value (step S. 6), that is, the following formula is determined. Whether it is established:

(The peak value of the power supply voltage this time) 2 (the peak value of the previous power supply voltage) 210V 7042-10203-PF 15 200935717 The difference between the power supply voltage values of the microprocessor 20' after the subtraction is not above ι〇ν In the case of the case (NO in step S. 6), the voltage value of the PAM command is not changed, and the process proceeds to the timing determination process shown in step S·1. On the other hand, when the difference between the power supply voltage values after the subtraction is 10 V or more (the case in the step S. 6), the microprocessor 20 determines the voltage of the PAM command corresponding to the difference between the reduced power supply voltages. The value is subtracted (step s. 7) and the PAM instruction is output to the converter circuit (step s. 8). Ο Here, when the microprocessor 20 performs control on the converter circuit 21 and the inverter circuit 22, all the control amounts are converted into relative values for control. The control amount of the microprocessor 20 in the case where the difference between the power supply voltages after subtraction is AC1 〇v is expressed as a relative value of "43". In the microprocessor 20, based on the control amount "43" corresponding to the power supply voltage ΑΠ〇ν, the voltage value of the p媸 command for lowering the converter voltage is calculated as a relative value. In the microprocessor 20 of the exemplary embodiment, a value 10 times the control amount "43" (that is, "") is calculated as a control amount for determining the voltage value of the immediately commanded, and the voltage value of the pAM command is changed to A voltage value corresponding to the calculated control amount. In the case shown in the exemplary embodiment, 〇. 55V (history, +, 铱c, and later figures) is calculated as the Lei Shishi of the PAM instruction corresponding to the control amount 430".

Voltage value, in the microprocessor 20, will PAM

The voltage of the command is set to n ^ rAM path 21. '"., and output the PAM command to the converter electric microprocessor 20, the gland Paw# PA1M command output to the converter electric S. 8), after the power supply voltage of the step The peak average value is recorded in the RAM of the specific F gentleman / J record (store & field (step S.9).

7042-10203-PF 200935717 The peak value of the voltage 'in the next processing is read as the peak value of the previous power supply voltage' and is used in the processing. Thereafter, the microprocessor 20 repeatedly performs the timing determination process shown in step s. Fig. 4 is a view showing the control of the converter voltage which does not perform the fluctuation of the power supply voltage described above. Fig. 5 is a view showing the control of the converter voltage for performing the fluctuation of the power supply voltage described above. Furthermore, in Figures 4 and 5

In the figure, the power supply voltage (primary voltage), the converter voltage, the number of revolutions of the motor unit 4, and the state change of the pam command are shown. In the fourth and fifth figures, the power supply voltage indicates the voltage value detected by the power supply voltage detecting unit 28, and when the motor unit 4 is stably driven in the full PAM control state (hereinafter referred to as a steady state), the power supply The voltage value is ac8〇v. The converter voltage indicates the voltage value detected by the converter voltage detecting portion 31, and the converter voltage in the steady state is DC 200V. The number of revolutions of the motor unit 4 indicates the number of revolutions detected by the number-of-turns detecting unit 18, and the number of revolutions in the steady state is 3,300 revolutions (rpm). Further, the PAM command indicates the control information outputted by the microprocessor (9) to the boost controller of the converter circuit 21 by the voltage value. The pAM command performs control of the converter circuit 21 with a reference voltage of 1.55 V and a low voltage with respect to the set voltage. Specifically, the voltage value is changed to be lower than the reference voltage value, and the output (the value of the converter voltage) in the switching power supply 21 is lowered to reduce the number of revolutions of the motor portion 4. When the voltage value is changed to be higher than the reference electric waste value, the output of the converter f path 21 (the value of the converter voltage) is increased, and the number of the motor unit 4 is increased. In the case where the control of the electric source voltage converter 7〇42-10203-PF 17 200935717 is not performed, the power supply is changed as shown in Fig. 4, as shown in Fig. 4 The voltage rises (for example, AC10V from AC8〇v). Then, according to the boost of the power supply voltage, 30V is set, the voltage is reached, and the converter is instantaneous as the power supply voltage rises.

It rises 42V and reaches DC242V). In the power supply lightning rise (for example, from the DC200V to the well, ', when the voltage changes, the converter voltage rises later after the converter voltage rises (for example, o.lsec), :: the converter voltage is driven by the motor portion 4 According to ❹ 4ΑΛ ΟΠΛΑ „ cut 1 A will rise (for example, from the gyration of the state to the slewing, to _ turn). Thus the number of revolutions of the motor unit 4 rises sharply, the building 4 will emit motor noise. In the case of the rotation number detecting unit, it is detected that the number of revolutions of the motor unit 4 is increased, and the motor is noisy when the number of revolutions is detected by the number of revolutions, and the motor noise is generated (for example, after the power supply voltage is changed). The number of revolutions of the OD is started to reduce the voltage of the converter. The voltage value of the command is set according to the calculated calculation result. The process of correcting and setting the voltage value of the PAM command is performed on the motor... After the number of revolutions starts to rise (for example, the power source voltage becomes 7 Usee), the drive control of the motor unit 4 can be effectively performed before the number of revolutions starts to rise. The microprocessor 20' is based on the set p. The voltage value of the AM command is used to control the port and the circuit 21, whereby the conversion=voltage is lowered according to the control and converges to the voltage value Κ2〇〇ν, and the convergence of the motor is reduced and the number of revolutions of the motor is reduced. The number of revolutions is 33Q0, and the convergence of the number of revolutions is realized by the PAM control that is controlled by the change in the number of revolutions. Therefore, the number of revolutions starts to rise to the number of revolutions 7042-10203-18. The number of revolutions must pass a certain period of time (for example, 5 se C.) Furthermore, the change control of the converter power value performed by the 纟PAM control continues until the number of revolutions of the motor 胄4 converges to the original number of revolutions ( Since the number of revolutions has been circulated to the original number of revolutions (for example, 5 sec), the continuation is performed. ❹ ❹ The setting of the 'PAM command power|value is set according to the fluctuation state of the number of revolutions. Therefore, as a result, the control amount for gradually reducing the number of revolutions can be easily determined (for example, it can be set to a value of only 0.5 V which is 0.5 V lower than 1.55 V of the reference power value). In the microprocessor 2, the number of revolutions of the armature 4 converges after the original number of revolutions, and the test command: the power threshold is returned to the initial voltage value (1.55 V). On the other hand, in the execution of Fig. 3 In the case of the control process of the converter voltage corresponding to the power supply voltage, as shown in FIG. 5, if the power supply voltage rises when the power supply is ground (for example, 30V rises from AC80V and reaches AC11 0V), the microprocessor 2 〇拉士立 δ 盗W is judged by the comparison/processing of the average power supply voltage value every 8msec (Fig. 3 is a half-step p 圃 step S.1~s. 6) rise. In this case, it is assumed that the power supply voltage is determined by the power supply voltage detecting unit 28, and the power supply voltage detecting unit 28 determines the power supply voltage value on the well 蕻 value, and the power supply voltage can be judged before the number of revolutions of the motor unit 4 rises. The value rises. In the microprocessor 20, the processing of the value of the power supply voltage is instantaneously reduced according to the value of the rising power supply voltage. At this time, the microprocessor 20 quickly and substantially reduces the voltage value of the PAM command, for example, the voltage of the PAM command.

The value is reduced from 1. 55V 1. 〇v to this 〇 win ** L J this 0.55V). By such a moment, the voltage of the PAM command is greatly reduced. This increases the rise of the converter voltage by 7042-10203-PF 19 200935717. In the air compressor 1 of the present exemplary embodiment, the rising converter voltage as shown in Fig. 4 can be controlled to rise to the left and right as shown in Fig. 5. The voltage reduction process of the PAM command of the microprocessor 20 can suppress the rise of the converter voltage to a minimum. Therefore, by suppressing the rise of the converter power, the increase in the number of revolutions of the motor unit 4 can be suppressed. At the minimum. In the air multi-shrinking machine j of the exemplary embodiment, the number of revolutions of the motor unit 4 that has been increased by 5 turns as shown in Fig. 4 can be controlled to about 100 revolutions as shown in Fig. 5. rise. Since the increase in the number of revolutions of the motor unit 4 can be suppressed as described above, generation of a motor or the like can be suppressed. In addition, by quickly performing the PAM instruction of the electric castle reduction process, the converter voltage and the number of revolutions can be reduced. Therefore, compared with the conventional method, the state can be shortened to the original converter dust and the number of revolutions. Time required. For example, in the conventional case, as shown in Fig. 4, it takes about 5 sec for the converter voltage and the number of revolutions to converge to the original state, but the control shown in Fig. 3 is applied to control the invention. As shown in Fig. 5, the time required for the converter's electric dust and the number of revolutions to converge to the original state can be shortened to about 55 sec. [When the voltage A of the AC power supply drops sharply] The control procedure of the micro-processing It 20 is explained in the case of the AC power supply and the (4) clear condition. First, the 'microprocessor·20, based on the timing operation stored in the ROM, judges whether or not the time from the voltage of the power supply voltage is obtained from the previous time.

7042-10203-PF 20 200935717 Time to pass sec (step su). In the case where the micro-processing has not passed the time of 4_Caf (in the case where the step _= judges that the time has elapsed after 4〇^ =^_断°°〇〇ec (in the case of the middle), the microprocessor 2 Step S. 11 ^ The device 20 checks the power supply voltage by the power supply voltage detecting portion 28 and records (stores) the characteristics of the RAM = the succeeding device, and the microprocessor 20 determines whether it is a step 8 at a specific time. 12).最小值 ❹ The minimum value of the pressure (step si 3) 'Power supply 7 township, 13) 'When it is not at a certain minimum value (Step s_13::: Dust... The timing of the judgment is judged. On the other hand, "In the case of the most = value (in the case of step S l3), the micro (four) 20, the average value of the peaks in a specific time is calculated, for example, the first one is excluded and the second is excluded. And the third peak average ^ is taken as the peak average value of the power supply voltage (step S14). Then, the microprocessor 20 reads (acquires) the peak value of the previous-time power supply voltage stored in a specific area of the fine The average value (step S.15) is determined by using the peak average value of the previous power supply voltage that has been read, and then determining the peak average value of the power supply voltage calculated from this time minus the peak average value of the power supply voltage calculated last time. Whether the obtained remainder is below -1 GV (step S. 16) 'that is, whether the following formula is established:

(This is the peak value of the power supply voltage) _ (the peak value of the previous power supply voltage) gl〇V The microprocessor 20, the difference between the power supply voltage values after the subtraction is not below _1〇v Next (in the case of step s. 丨6), do not change the PM command

The voltage value of 7042-10203-PF 21 200935717 is shifted to the timing determination process shown in step S.π. On the other hand, when the difference between the power supply voltage values after the subtraction is less than -1 〇 v (in the case of step S.16), the microprocessor 2 〇 corresponds to the difference between the reduced power supply voltages. The voltage value of the PAM instruction is subtracted (step S. 17), and the PAM command is output to the converter circuit 21 (step s. 18 >

Here, in the case of reducing the voltage value of the PAM command, the microprocessor 20 only slightly lowers the voltage value in order to suppress the overshoot state of the primary current, and sets the lowering time of the reduced voltage value to be longer. . In other words, the microprocessor 20 suppresses the sudden and large fluctuation of the secondary current by the fluctuation processing of the converter voltage, and only slightly reduces the power value setting of the PAM command (with a slight The gain is reduced) and the reduced voltage value is continued for a certain period of time. Specifically, when the difference between the power supply voltage values after the subtraction is less than -m (in the case of step s.16), the microprocessor 20 changes the output gain of the voltage set according to the _ command to 2/. 3 to ι/8 (for example, as shown in Fig. 8 which will be described later, as pAM

When the reference value of the command is 1.55V, the voltage value is lowered by 〇2V, and the face is changed to $1 U·ZV to change it to 1.35V), and the output gain after the change is maintained. Time, then let the output gain return to the original gain. After the microprocessor 20' outputs the PAM command from the phase 7 to the converter circuit 21 (step S.18), the peak value of the power supply voltage of the band, 広 & ) in a specific area of the RAM (k step S. 19). The peak value of the power supply voltage thus stored, in the next _ + 甘, - 欠 processing, will be read as the peak value of the previous power supply voltage, and in the process of profiting 7042-10203-PF 22 200935717 The timing judgement shown. Thereafter, the microprocessor 20 repeatedly performs the step su processing. Figure 7 shows the control of the Korean converter voltage that does not perform the change of your voltage according to the ECG. The 8th figure shows the change of the converter voltage. Controlled map. Further, in the seventh and eighth graphs, the power supply voltage (primary voltage), the number of revolutions of the converter motor unit 4, and the state change of the ΡΑΜ command are also displayed, and the state change of the primary current is also displayed. The first current shown in Fig. 7 and Fig. 8 shows the current value detected by the power supply current detecting unit 3, and in the steady state, the Gore cold-human electric gamma value is 14. 5 。. As for the power supply voltage (primary voltage), conversion test 厌 Ε, Ε Λ 、 , " voltage motor 邛 4 number of revolutions and ΡΑΜ command, then the same as the above figure 4 and the second 5 圃 5 5 In the diagrams shown in Fig. 7 and Fig. 8, the voltage value of the steady state in the power supply castle is ^, and the number of revolutions in the steady state of the motor unit 4 is 2 turns. In the case of not performing the control processing of the converter voltage corresponding to the power supply voltage shown in Fig. 6, > Fig. 7, if the power supply voltage changes, the power supply voltage drops (for example, from ACU〇v 3〇v, reaching ac8〇v), the converter voltage drops instantaneously as the supply voltage drops (for example, 42V from DC200V, reaching DC1 58V). When the converter voltage drops when the power source is changed, the number of revolutions of the motor unit 4 driven by the converter voltage decreases as the converter voltage decreases (for example, 200 turns from 2 turns to 200 turns) 180 turns). Further, as the number of revolutions of the motor portion 4 rises as the converter voltage rises, the number of revolutions of the motor portion 4 decreases as the converter voltage drops 7042-10203-PF 23 200935717. fast. In this case, when the number of revolutions of the motor unit 4 is increased, even if the converter voltage is increased, the number of revolutions is hard to rise due to the influence of the load of the internal pressure of the sump portion 2. On the other hand, when the number of revolutions of the motor unit 4 is lowered as compared with the case where the voltage of the converter is increased, the influence of the load on the internal pressure of the sump portion 2 is small, and therefore the number of revolutions is short. It decreases as the converter voltage decreases. In this way, the number of revolutions is rapidly lowered as the converter voltage is lowered. Therefore, in the microprocessor, the number of revolutions of the motor unit 4 can be quickly determined based on the number of revolutions detected by the number-of-turns detecting unit 18. reduce. Further, in the microprocessor 20, based on the decrease in the number of revolutions of the detected motor unit 4, calculation processing for increasing the converter voltage is started, and the voltage value of the PAM command is set in accordance with the calculated calculation result. On the other hand, in the case where the voltage value of the power source voltage drops, the microprocessor 20 ensures the air compressor! The output state (the power value is constant, so that the value of the primary current rises and rises as the power supply voltage decreases. When the current rises sharply like this, the microprocessor 2〇 sets the voltage value of the PAM command. In order to maintain the primary current at a specific value, in the air compressor unit of the exemplary embodiment, it is maintained at 5 VIII. Therefore, in the microprocessor 20, the primary current should rise less quickly. The voltage of the PAM command The value is greatly reduced (for example, as shown in Figure 7, decreasing 1.0V and set to 0·55ν), causing the reduced converter voltage to rise quickly (for example, during a 2 second period). Because the converter is like this The voltage rises sharply, so that the current value of the primary current is rapidly reduced, and as a result, an overshoot occurs for the primary current (for example, the current value of the current is 7042-10203-pf 24 200935717 varies by 10 在 in a period of 3 seconds). When the overshoot of the primary current occurs, the interrupting function of the power supply is started as the primary current rises, causing the interruption of the driving power. Ο Ο On the other hand, 'execution 6 is shown In the case of the control processing of the converter voltage corresponding to the power supply voltage, as shown in Fig. 8, when the power supply voltage fluctuates, if the power supply voltage is lowered (for example, by reducing ACCV from ACl 1 〇ν by 30V), When the power supply voltage is lowered, the converter voltage is instantaneously lowered (for example, '42V to DC158V from DC200V). When the power supply voltage changes, if the converter voltage drops, the number of revolutions of the motor unit 4 driven by the converter voltage corresponds. As described above, since the number of revolutions is rapidly lowered in response to a decrease in the voltage of the converter, the microprocessor 20 can be based on the number of revolutions detected by the number-of-turns detecting unit 18. The microprocessor 20 quickly determines the decrease in the number of revolutions of the motor unit 4. Further, in the microprocessor 20, based on the decrease in the number of revolutions of the detected motor unit 4, the calculation processing for increasing the converter voltage is started, and the calculation processing according to the calculation is performed. The voltage value of the command is set. At this time, the microprocessor 20 sets the command to be reduced only to reduce the overshoot of the primary current. By pressing, the converter voltage can be gradually increased. In the air compressor of the present invention, as shown in Fig. 8, the voltage value of the PAM command is lowered by 〇·2V from the reference voltage value i 55v to be set to 1. 3 5 V, and maintaining the set state for $5 seconds. By setting the PAM command as described above, the reduced converter voltage is recovered and stabilized (in the exemplary embodiment, the ratio is restored to The time it takes for the original voltage value to be 185V lower (for example, 5 seconds), 7042-10203-PF 25 200935717 is longer than the 2 seconds taken to stabilize the converter voltage as shown in Figure 7. Because the converter voltage does not rise sharply, the secondary current can rise and fall rapidly and cause overshoot. 1 body + In the case shown in Fig. 8, the current of the upper side shown in Fig. 7 can be reduced to about 3A. Therefore, it is possible to effectively suppress the occurrence of the overshoot phenomenon of the primary current, and it is possible to suppress the interruption function of starting the power supply with the increase of the secondary current.

Furthermore, 'as described above', by slightly lowering the voltage value of the pAM command, the number of revolutions is reduced more than the case shown in Fig. 7 (reduced from _() by 200 revolutions to leaky rotation) ((from The rotation is reduced to 1 650 rpm. 'The reduction in the number of revolutions is because the number of revolutions of the motor unit 4 as the reference is originally a low number of revolutions (2 turns), so even if the number of revolutions is reduced, It is also not easy to generate motor noise. Therefore, even if the degree of reduction in the number of revolutions is increased, the effect of suppressing overshoot can be exerted. μ As described above, in the air compressor 1 of the present exemplary embodiment, the voltage of the power source voltage is detected. The value is set in accordance with the sudden rise or fall of the detected voltage value, and the setting of the command is executed. Therefore, the motor noise generated by the fluctuation of the number of revolutions of the motor unit 4 can be suppressed, and the dog can suppress the primary current. Specifically, when the power supply voltage rises sharply, the microprocessor 2 〇, when the number of revolutions of the motor unit 4 has not risen after detecting the rise of the power supply voltage, the setting is made. The converter voltage is greatly reduced by the ρΑΜ command and output to the converter circuit 21. According to the ΡΑΜ command, the converter voltage of the 7042-10203-PF 26 200935717 in the converter circuit 21 is rapidly lowered, and can be executed in the motor unit 4. Since the number of revolutions of the motor unit 4 is reduced before the number of revolutions is rapidly increased, it is possible to suppress an increase in the number of revolutions of the motor unit 4, and it is possible to effectively suppress the motor noise generated as the number of revolutions increases. The device 20' can quickly output a PAM command for lowering the converter voltage to the converter circuit 2. Therefore, it is possible to suppress the rise rate of the converter voltage 'and' to shorten the period during which the converter voltage converges. ❹ In addition, at the power supply voltage In the case of a sudden drop, the microprocessor 2〇, immediately after detecting the drop of the power supply voltage, immediately sets the PAM private command to increase the converter voltage and outputs it to the converter circuit 21. The microprocessor 2〇, at the PAM In the command, the PAM command is set to gradually increase the converter voltage by γ, thereby suppressing the rapid change of the converter voltage, and suppressing the corresponding The overshoot phenomenon of the primary current caused by the rapid change of the converter voltage, and the function of interrupting the power source that is activated by the increase of the primary current can be suppressed. The air compression 1 of the exemplary embodiment of the present invention will be described in detail above using the drawings. The air compressor of the present invention is not limited to the above-described exemplary embodiments, and various changes or modifications within the scope of the patent application are within the technical scope of the present invention. For example, in Figure 4 In the figure shown in Fig. 5, AC80V is the power supply voltage value in the steady state, and the converter voltage in the steady state with DC200V is 3300 revolutions (rpm) as the number of revolutions in the steady state, with 丨.55v as The reference voltage value of the PAM command. However, each value in the steady state is not limited to the above-described set value, and can be appropriately changed. In addition, in the same manner, in the diagrams shown in Figs. 7 and 8, AC11〇v 7〇42-l〇2〇3-pF 27 200935717 is the steady state power supply voltage value 'with DC200V as the steady state. The converter voltage 'takes 2000 revolutions (r pm) as the number of revolutions in the steady state, 14·5A is the primary current value in the steady state, and 丨.55V is the reference voltage value of the pAM command, but 'is in steady state. The respective values in the above are not limited to the above-described set values, and can be appropriately changed. The present application is made in accordance with the present patent application (Japanese Patent Application No. 2007-320803) filed on Dec. 12, 2007, the content of which is hereby incorporated by reference. [Industrial Applicability] The present invention is applied to a motor control device having a converter unit that generates a converter voltage for boosting a power supply voltage to drive a motor portion. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a block diagram showing a schematic configuration of an air compressor of a typical embodiment. Fig. 2 is a block diagram showing the control circuit of the air compressor of the exemplary embodiment. Fig. 3 is a flow chart showing the processing executed by the microprocessor of the exemplary embodiment in the case where the power supply voltage rises. Fig. 4 is a view showing changes in state of the power supply voltage, the converter voltage, the number of revolutions, and the state of the PAM command which are varied in accordance with the conventional processing method in the case where the power supply voltage rises. Fig. 5 is a view showing changes in the state of the power supply dust, the converter power a, the number of revolutions, and the state of the command, which are varied in the case of the power supply voltage rise of 7042-10203-PF 28 200935717 according to the method shown in Fig. 3. Figure 6 is a flow chart showing the processing performed by the microprocessor of the exemplary embodiment in the case where the power supply is depleted. Fig. 7 is a schematic diagram showing changes in the state of the power supply voltage, the converter voltage, the number of revolutions, the primary voltage, and the state of the PAM command, which are varied in accordance with the conventional processing method in the case where the power supply voltage is lowered. The φ 帛8 diagram shows a schematic diagram of the state of the power supply voltage, the converter voltage, the number of revolutions, the primary voltage, and the state of the PAM command which are varied in the case where the power supply voltage is lowered in accordance with the method shown in FIG. [Description of main component symbols] 1 Air compressor (motor control device) 2 Reservoir portion 3 compressed air generating unit ❹ 4 Motor unit 5 Control circuit unit 8 (storage unit) Storage tank 9 Compressed air outlet port 93 (Compression High pressure take-out port of air take-out port (compressed air take-out port) normal pressure take-out port l〇a, 10b pressure-reducing valve 14 is connected to tube 16 (motor part) stator

7042-10203-PF 29 200935717 16a, 16b, 16c... (stator) coil 17 rotor 18 (motor portion) rotation number detecting unit 20 microprocessor (control unit) 21 converter circuit (converter unit) 22 Inverter circuit 24 (converter circuit) rectifier circuit 25 (converter circuit) boost circuit 25a (boost circuit) switching element 26 (converter circuit) smoothing circuit 27 boost controller 28 power supply voltage detection Output 29 AC power supply 30 Power supply current detecting unit 31 Converter voltage detecting unit ❹ 7042-10203-PF 30

Claims (1)

200935717 « X. Application for Patent Park: 1. A motor control device comprising: a converter 胄 generating a converter voltage for boosting a power supply voltage to drive a motor portion; a control unit controlling the converter portion to The value of the converter voltage is changed; the power supply house detection unit detects the value of the power supply voltage, and the control unit detects the value of the power supply voltage based on the beta value of the power supply voltage detected by the power supply voltage detecting unit. Changing, and controlling the value of the converter voltage boosted by the converter unit corresponding to the amount of change in the value of the detected power supply voltage. 2. The motor control device according to claim 1, wherein The control unit controls the converter unit based on the value of the power source voltage detected by the power source voltage detecting unit, and detects that the value of the power source voltage rises sharply, and lowers the number of revolutions before the motor unit rises. The value of the converter voltage. 3. The motor control device according to claim 1, wherein the control unit detects the value of the power supply voltage detected by the power supply voltage detecting unit, and detects that the value of the power supply voltage drops sharply. The converter section is controlled such that the value of the converter voltage rises slowly. 7042-10203-PF 31