CN1212475C - Stator controller - Google Patents

Abstract

The object of the present invention is to provide a stator controller which can easily simplify the structure when the auxiliary switch is integrated with the stator controller, and prevent the stator from being in the state even if the semiconductor relay is broken due to a short circuit In addition, the stator can still be driven even if the calculation processing unit is damaged. The stator controller includes: a control circuit part (11); a semiconductor relay (12), which controls the operation of the auxiliary switch (5) arranged on the stator; a drive signal detection mechanism (30), The drive signal detection mechanism (30) detects the on/off of the drive signal of the auxiliary switch (5) input from the key switch (14) by measuring the voltage of the L terminal (10) of the semiconductor relay (12). The detection result of the drive signal detection means (30) actuates the auxiliary switch (5) to control the stator.

Description

Stator controller

Technical field to which the present invention belongs

The present invention relates to a stator controller. In particular, the present invention relates to a stator controller for controlling a stator for starting an engine of a motor vehicle or the like.

existing technology

For example, as in Japanese Patent Application Laid-Open No. 11-190267, there is generally known an existing device for electrically controlling an electromagnetic switch of a stator for an engine. Fig. 8 shows a circuit diagram of such a conventional stator control circuit. In this figure 8, the reference numeral 2 represents the main switch part, the reference numeral 3 represents the stator M terminal, the reference numeral 4 represents the stator B terminal, the reference numeral 5 represents the auxiliary switch, the reference numeral 6 represents the auxiliary switch coil, the reference numeral 7 represents the stator controller, and the reference numeral 8 represents the S Terminals, reference numeral 9 represents the B terminal, reference numeral 10 represents the L terminal, reference numeral 11 represents the control circuit part, reference numeral 12 represents the semiconductor relay, reference numeral 13 represents the E terminal, reference numeral 14 represents the key switch, and reference numeral 15 represents the battery.

In the existing stator control circuit shown in Figure 8, the driving signal is input into the stator controller 7 composed of electric key switch 14, engine control assembly, etc., the driving signal is detected by the S terminal, and when the semiconductor relay 12 is turned on state, the electromagnetic switch of the stator, for example, is supplied with electric power for driving the stator auxiliary switch (hereinafter referred to as “auxiliary switch”) 5 from the stator B terminal 4 .

Fig. 9 shows a functional system diagram of a conventional stator control circuit. In FIG. 9, reference numeral 21 denotes a protection circuit unit, numeral 22 denotes a drive signal input unit, numeral 23 denotes an arithmetic processing unit, numeral 24 denotes a protection circuit unit, numeral 25 denotes a power supply circuit unit, and numeral 26 denotes an output control unit.

The drive signal that electric key switch 14 outputs is input in the drive signal input part 22 by the protection circuit part 21 that is arranged on the control circuit part 11 (referring to Fig. 8) in the stator controller 7, by arithmetic processing part 23, judges whether can carry out stator. When the operation is turned on (hereinafter referred to as "ON")/off (hereinafter referred to as "OFF"), if the stator operation is turned on, a drive signal is sent to the output control unit 26 to operate the auxiliary switch 5 . In addition, electric power for an auxiliary switch coil 6 ( FIG. 8 ) for operating the auxiliary switch 5 is supplied from the stator B terminal 4 .

In addition, the following method is generally adopted. In this method, when the stator controller 7 is not started, the semiconductor relay 12 (Fig. 8) driving the auxiliary switch 5 is in an off state, the stator controller 7 is started, and when the drive signal is detected , the semiconductor relay 12 is in the ON state, supplying power to drive the auxiliary switch 5 .

Problems to be solved by the present invention

Since the existing device is constituted as above and directly detects the drive signals from the key switch and the engine control unit, etc., the controller must require terminals and wires for detecting the above-mentioned drive signals. Therefore, when the auxiliary switch is integrated with the stator control circuit, there is a problem of complicated structure.

In addition, there is another problem that if the auxiliary switch is driven by the electric power of the stator B terminal voltage, since the stator B terminal is directly connected to the battery B terminal, if the semiconductor relay driving the auxiliary switch is broken due to a short circuit, the stator will rotate.

In addition, there is a problem that if a part of the control circuit, such as an arithmetic processing unit, is broken, it is impossible to supply power to drive the auxiliary switch, and the stator cannot be driven.

The present invention was made to solve the above-mentioned problems, and an object of the present invention is to provide a stator controller which is easy to simplify the structure when the auxiliary switch is integrated with the stator controller, and which can be used even when the semiconductor relay is In the case of damage due to a short circuit, the stator is still prevented from rotating. In addition, even if the arithmetic processing unit is damaged, the stator can still be driven.

Technical solutions for solving problems

The present invention relates to a stator controller, which is used to control the stator used to start the engine, which includes: a control circuit, which controls internal actions; a semiconductor relay, which is controlled by the control circuit Control the operation of the electromagnetic switch provided on the stator; drive the signal detection mechanism, which measures the terminal voltage of the semiconductor relay to turn on/off the drive signal of the electromagnetic switch input from the electric key switch. Detection: actuating the electromagnetic switch to control the stator according to the detection result of the driving signal detection mechanism.

In addition, the stator controller includes a power control means that activates the power supply of the control circuit when the drive signal detection means detects that the drive signal is turned on, and when the drive signal is detected that the drive signal is turned off. In this case, the power supply of the control circuit is turned off after a certain period of time has elapsed from the moment of turning off.

Also, the semiconductor relay that drives the electromagnetic switch is normally in an energized state, and is turned off by a signal from the control circuit.

In addition, the electric power of the above-mentioned electromagnetic switch is supplied by the above-mentioned key switch.

Furthermore, a stator protection mechanism for protecting the stator is provided in the control circuit.

In addition, the stator controller includes a differential circuit that measures the power supply voltage of the stator, subtracts the DC component of the power supply voltage, and detects only the AC component, based on which the stator protection mechanism performs the above-mentioned Stator overrun and overheating protection.

Brief description of the drawings

Fig. 1 is a circuit diagram showing the configuration of a stator controller according to a first embodiment of the present invention;

Fig. 2 is a configuration diagram showing the configuration of a stator controller according to a first embodiment of the present invention;

Fig. 3 is an explanatory diagram of collecting changes in the voltage of the L terminal of the stator controller according to the first embodiment of the present invention in the form of a table;

Fig. 4 is an explanatory diagram showing the fluctuation of the stator B terminal voltage of the stator controller according to the first embodiment of the present invention by a graph;

Fig. 5 is an explanatory diagram showing, by a graph, the fluctuation of the stator B terminal voltage when a part of the DC component is removed by a Zener diode in the stator controller according to the first embodiment of the present invention;

Fig. 6 is an explanatory diagram showing, by a graph, the fluctuation of the stator B terminal voltage when resistors are connected in series to divide the voltage in the stator controller according to the first embodiment of the present invention;

Fig. 7 is an explanatory diagram showing the fluctuation of the voltage of the stator B terminal when the direct current component is removed by the differential circuit in the stator controller according to the first embodiment of the present invention;

Fig. 8 is a circuit diagram showing the constitution of a conventional stator protector;

FIG. 9 is a configuration diagram showing the configuration of a conventional stator control circuit.

Embodiments of the invention

first embodiment

FIG. 1 is a circuit diagram of a stator controller according to an embodiment of the present invention, and FIG. 2 is a functional system diagram of a stator control circuit provided in the stator controller of FIG. 1 . In these drawings, reference numeral 1 denotes a stator motor part, reference numeral 2 denotes a main switch part, reference numeral 3 denotes a stator M terminal, reference numeral 4 denotes a stator B terminal, reference numeral 5 denotes an auxiliary switch, reference numeral 6 denotes an auxiliary switch coil, and reference numeral 7 denotes Stator controller, reference numeral 9 represents B terminal, reference numeral 10 represents L terminal, reference numeral 11 represents the control circuit part, reference numeral 12 represents a semiconductor relay, reference numeral 13 represents E terminal, reference numeral 14 represents an electric key switch, and reference numeral 15 represents a battery. In addition, in FIG. 2, numeral 23 denotes an arithmetic processing unit, numeral 24 denotes a protection circuit unit, numeral 25 denotes a power circuit unit, numeral 26 denotes an output control unit, and numeral 30 denotes a drive signal detection unit.

The difference between this embodiment and the structure of the above-mentioned conventional example is that, as can be seen when comparing FIGS. 1 and 8, the S terminal 10 shown in FIG. 8 is not provided in this embodiment. In addition, as known when comparing Fig. 2 and Fig. 9, the difference is that in this embodiment, along with the omission of the S terminal 10, the protection circuit 21 and the driving circuit shown in Fig. 9 opposite to this terminal are not provided. Another difference of the signal input unit 22: In this embodiment, a driving signal detection unit 30 for detecting the driving signal is added.

The control method of the stator controller shown in Fig. 1 and Fig. 2 will be described below. First, the auxiliary switch coil 6 of the auxiliary switch 5 is connected to the driving signal input from the key switch 14 , the engine control unit (not shown in the figure) and the like. The driving signal detection part 30 detects the current and the voltage of the L terminal 10 of the on-resistor of the semiconductor relay 12 on the control board connected to the auxiliary switch 5, thereby judging the input from the key switch 14, the engine control module, etc. Turn on and off the drive signal. When the drive signal is turned on, the drive signal is sent to the output control unit 26 to operate the auxiliary switch 5 . In addition, in this embodiment, electric power for operating the auxiliary switch is supplied from the circuit of the key switch 14 .

That is, the voltage of the L terminal 10 which is the terminal of the output control unit 26 connected to the auxiliary switch 5 is as shown in the table in FIG. 3 . In the table of FIG. 3 , (1) represents auxiliary switch coil conduction current×semiconductor relay conduction resistance, and (2) represents battery voltage. In addition, the state in which the drive signal is on and the semiconductor relay is off specifies the state in which the sub-protector operates.

Since the driving signal detection part 30 measures the voltages of (1) and (2) in the table in Fig. 3, it can be used for the driving signal input from the key switch 14, the engine control module, etc. without the S terminal and the lead wire. The connection and disconnection are judged.

In addition, since the potential difference of the auxiliary switch coil energizing current x the on-resistor of the semiconductor relay is small, the amplification by a discharge circuit such as an operational amplifier can be detected with higher accuracy.

Therefore, by detecting the auxiliary switch coil energizing current × the potential difference of the on-resistor of the semiconductor relay, the connection of the drive signal input from the key switch 14, the engine control unit, etc. It can be judged whether it is on or off, thus, no connection wires for sending the drive signal are needed, the structure is simple, and the cost can be reduced.

Next, if the drive signal detection unit 30 detects the drive signal, the arithmetic processing unit 23 automatically turns on (ON) the power supply circuit unit 25 of the stator controller 7; If the signal is detected, the arithmetic processing unit 23 can automatically disconnect (OFF) the power supply circuit unit 25, so that the power consumption of the control circuit unit 11 can be reduced.

In addition, it is set so that the semiconductor relay 12 driving the auxiliary switch 5 is normally on, and the arithmetic processing unit 23 turns off the semiconductor relay 12 driving the auxiliary switch 5 . In addition, power for the auxiliary switch is supplied from the key switch side. Therefore, even if the arithmetic processing unit 23 is broken or the semiconductor relay 12 is broken due to a short-circuit state, the action of the stator is still in the same action state as that of a stator without a control circuit according to the drive signal of the electric key switch, so it can be easily reduced. cost.

Therefore, as a fail-safe device, there is no need to install a second microcomputer for monitoring the arithmetic processing unit 23 formed of a microcomputer, or to install a second semiconductor relay, and the cost can be easily reduced.

Generally, since a stator protector is provided inside a device in which a stator control circuit is installed, a stator protector is also provided in this embodiment. Functions as a stator protector include, for example, an overrun prevention function, an overheat protection function, and a re-engagement prevention function.

Among the functions of the stator protector, it is known to use fluctuations in the stator B terminal voltage. The fluctuation of the voltage of the stator B terminal 4 will be briefly described below according to FIG. 4 .

If the user operates the key switch 14 to move the stator, since a large current (rush current) flows in an instant, the stator B terminal voltage drops sharply at (a) as shown in the figure.

Then, when the motor is started to rotate by the stator during the period (b), since the energized current to the stator gradually decreases, the stator B terminal voltage gradually rises.

After that, if the engine is rotated by the stator (starting state) during the period (c), since the engine torque changes according to the compression step and the expansion stroke, the waveform of the stator B terminal voltage is the same as the change of the engine torque, Periodic changes.

Next, when the engine starts to start during the period (d), since the load on the stator decreases due to the torque generated by the engine, the stator B terminal voltage rises.

Then, in the period (e), regardless of whether the engine starts, the stator is in the state of rotating with the engine (overrun state), since the stator is in the no-load state, the stator B terminal voltage is constant.

Finally, when the key switch 14 is turned off at point (f), since the stator is stopped, the stator B terminal voltage returns to the initial value before the engine was started.

The state of the period (c) and period (e) of the stator B terminal voltage is called "fluctuation", and it is generally known that the overrun prevention function and overheating protection function are realized by using this fluctuation.

However, the above-mentioned fluctuation of the stator B terminal voltage forms a waveform in which an AC component and a DC component are superimposed. In this waveform, since the voltage is high, it is difficult to process it by the arithmetic processing unit as it is. Therefore, the DC component must be subtracted or removed to some extent.

In the case of subtraction calculation, there is a method of removing part of the DC component through a Zener diode, etc. as shown in Figure 5, and a method of dividing the voltage by connecting resistors in series as shown in Figure 6, but the battery must be controlled according to 12v and 24v The circuit substrate divides the voltage, which is difficult to share. In addition, in the method of voltage division, in the states of the period (c) and period (e) of the stator B terminal voltage, the amplitude of the fluctuation is small.

In order to remove the DC component of the fluctuation of the stator B terminal voltage, as shown in FIG. 7, by setting a differential circuit formed of capacitors and resistors, simplified processing can be easily realized.

By removing the DC component of the fluctuation of the stator B terminal voltage by this differential circuit, the processing by the arithmetic processing unit 23 becomes easy, and the state fluctuation of the stator B terminal voltage during (c) and period (e) is also reduced, and the accuracy Also improve. In addition, when using 12v and 24v, the control circuit board can be easily used in common.

As mentioned above, in this embodiment, since the stator controller 7 directly detects the drive signals output by the electric key switch 14, the engine control mechanism, etc. through the drive signal detection part 30, in the controller, there is no need to detect The S terminal of the driving signal and the connection line used to transmit the driving signal. Therefore, when the auxiliary switch (magnetic switch) 5 is integrated with the stator controller 7, the structure can be simplified.

In addition, in this embodiment, since the auxiliary switch (electromagnetic switch) is driven according to the power from the key switch 14, even if the semiconductor relay 12 is broken due to a short circuit, the stator can be prevented from rotating. Therefore, there is no need to provide a second microcomputer, a semiconductor relay, etc. for fail-safe purposes. Keep costs down. However, the stator action is performed according to the key switch 14 .

In addition, in this embodiment, since the semiconductor relay driving the auxiliary switch (electromagnetic switch) is normally turned on, the control circuit outputs a signal to turn off the semiconductor relay. In addition, according to the power of the auxiliary switch through S The mode of terminal side supply is set, so even if a part of the control circuit (such as the calculation processing unit 23) is damaged, the electric power for driving the auxiliary switch (electromagnetic switch) can still be supplied, and the stator can be driven.

In addition, in this embodiment, in the device using the pulse of the stator B terminal for the protection function, the pulse of the stator B terminal is processed by the differential circuit, and the substrate for the battery 12v and 24v can be easily shared.

Effect of the present invention

The present invention relates to a stator controller for controlling a stator for starting an engine, comprising: a control circuit for controlling internal operations; a semiconductor relay for operating an electromagnetic switch provided on the stator The control of the drive signal detection mechanism, which detects the on/off detection of the drive signal of the electromagnetic switch input from the electric key switch by measuring the terminal voltage of the above-mentioned semiconductor relay, according to the detection result of the above-mentioned drive signal detection mechanism The above-mentioned electromagnetic switch is operated to control the stator; therefore, the terminals for detecting the drive signal are unnecessary, thereby reducing the number of terminals, which can make the structure of integrating the auxiliary switch and the stator controller simple, and Even if the semiconductor relay is broken due to a short circuit, the stator is prevented from rotating, and even if the arithmetic processing unit is broken, the stator can still be driven.

Furthermore, since the stator controller has a power control mechanism, the power control mechanism activates the power supply of the control circuit when the drive signal detection mechanism detects that the drive signal is turned on, and when the drive signal is detected, In the case of turning off, the power supply of the control circuit is turned off after a certain time has elapsed from the moment of turning off, so that the power consumption of the control circuit can be reduced.

In addition, since the semiconductor relay that drives the above-mentioned electromagnetic switch is set so that it is always in the energized state and is in the off-state by the signal from the above-mentioned control circuit, even if the control circuit is broken, for example, the operation of the electromagnetic switch will continue. According to the drive signal input from the key switch, it can prevent the stator from not moving.

In addition, since the electric power of the electromagnetic switch is supplied from the key switch, even if the semiconductor relay is broken due to a short-circuit state, the rotation of the stator can be prevented.

In addition, since a stator protection mechanism for protecting the stator is provided on the control circuit, overrun prevention, heat protection, and re-engagement prevention can be performed.

Furthermore, since the stator controller includes a differential circuit, the differential circuit measures the power supply voltage of the above-mentioned stator, subtracts the DC component of the power supply voltage, and only detects the AC component. According to the AC component, the above-mentioned stator protection mechanism The overrun and overheat protection of the stator is carried out, so the substrates for the batteries 12v and 24v can be easily shared.

Claims (6)

1. stator controller, this stator controller is used for the stator of the usefulness of piloting engine is controlled, and it comprises:

Control circuit, this control circuit carries out the control of internal actions;

Semiconductor relay, this semiconductor relay are arranged at the control of the action of the magnetic switch on the said stator by the control of above-mentioned control circuit;

Drive signal feeler mechanism, this drive signal feeler mechanism is undertaken from the detection of the on/off of the drive signal of the magnetic switch of key switch input by the terminal voltage of measuring above-mentioned semiconductor relay;

According to the testing result of above-mentioned drive signal feeler mechanism, make above-mentioned magnetic switch action, and stator is controlled.

2. stator controller according to claim 1, it is characterized in that, it comprises the power controling machine structure, this power controling machine structure detects the occasion of the connection of above-mentioned drive signal in above-mentioned drive signal feeler mechanism, make the power supply starting of above-mentioned control circuit, and in the occasion of the disconnection that detects above-mentioned drive signal, from moment of this disconnection behind certain hour, the power supply of above-mentioned control circuit is disconnected.

3. stator controller according to claim 1 and 2 is characterized in that, makes the semiconductor relay that drives above-mentioned magnetic switch be in "on" position at ordinary times, become off state by the signal from above-mentioned control circuit.

4. stator controller according to claim 1 and 2 is characterized in that the electric power of above-mentioned magnetic switch is supplied with by above-mentioned key switch.

5. stator controller according to claim 1 and 2 is characterized in that, is used for protecting the stator protection mechanism of said stator to be arranged at above-mentioned control circuit.

6. stator controller according to claim 1 and 2 is characterized in that it comprises differentiator, this differentiator measure said stator supply voltage, the flip-flop of this supply voltage is carried out subtraction, and only alternating component is detected;

According to this alternating component, the said stator protection mechanism carries out transfiniting of said stator and overheated protection.

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