TWI866320B - Integrated motor drive system - Google Patents

Abstract

An integrated motor drive system is provided, the integrated motor driving system is suitable for electrical connection with commercial power. The motor drive integrated system includes a host controller, a power supply module, a buffer module, and a plurality of motor drive integrated machines. The power supply module is electrically connected to the host controller, and receives commercial power and converts commercial power into a DC power supply. The buffer module is electrically connected to the power module, receives the DC power, and filters out the ripple voltage of the DC power to obtain an operating voltage. The motor drive unit is electrically connected to the buffer module and receives an operating voltage.

Description

Motor drive integrated system

The present disclosure relates to a motor drive integrated system, and more particularly to a motor drive integrated system with simplified wiring and reduced size.

The existing motor drive system has complicated wiring, which makes the wire cost of the motor drive system high. In addition, the existing motor drive system is large in size, which is not conducive to the user's space planning.

Therefore, a motor drive integrated system is needed to improve the above-mentioned shortcomings.

The disclosed embodiment provides a motor-drive integrated system suitable for being electrically connected to an external power source. The motor-drive integrated system includes a host controller, a power module, a buffer module, and a plurality of motor-drive integrated machines. The power module is electrically connected to the host controller, receives an external power source and converts the external power source into a DC power source, and converts the DC power source into an operating voltage. The buffer module is electrically connected to the power module, receives a DC power source to filter out the ripple voltage of the DC power source, and receives an operating voltage. The motor-drive integrated machine is electrically connected to the buffer module, and receives the DC power source and the operating voltage.

In one embodiment, each of the motor-driven integrated machines includes a motor, a driver, and a motor frame. The motor includes a connecting board. The driver includes a power board and a terminal block. The power board is disposed adjacent to the connecting board. The connecting board and the power board are directly connected through a connector. The motor frame includes a motor accommodating groove, a power board accommodating groove, and an opening. The motor accommodating groove accommodates and installs the motor and exposes the connecting board. The power board accommodating groove accommodates and installs the power board, and the power board is electrically connected to the connecting board. The opening accommodates and installs the terminal block.

In one embodiment, the driver further includes a control board connected to the working voltage and the power board.

In one embodiment, the control board is connected to a host controller, and the control board receives speed or position commands and returns the status of the motor through a communication circuit.

In one embodiment, the driver further includes a position feedback device, and a position feedback circuit of the control board detects a magnetic signal or an optical signal of the position feedback device to obtain motor position information.

In one embodiment, the power board includes a DC/AC inverter.

In one embodiment, the power board includes a voltage and current feedback circuit.

In one embodiment, the power board has a gap so that the board surface of the power board is discontinuous.

In one embodiment, the connection board includes a filter capacitor, and the connection board receives the DC bus power provided by the buffer module.

In one embodiment, heat from the power board is transferred to the motor frame.

The present disclosure can be more clearly understood by referring to the following detailed description and the accompanying drawings. It should be noted that in order to make it easier for readers to understand and the drawings are concise, the multiple drawings in the present disclosure only depict a portion of the display device, and the specific components in the drawings are not drawn according to the actual scale. In addition, the number and size of each component in the figure are only for illustration and are not used to limit the scope of the present disclosure. In addition, similar and/or corresponding reference numerals may be used in different embodiments, which is only for the purpose of simply and clearly describing some embodiments, and does not mean that there is any correlation between the different embodiments and/or structures discussed.

In addition, relative terms such as "below" or "bottom" and "above" or "top" may be used in the embodiments to describe the relative relationship of one element of the diagram to another element. It is understood that if the device in the diagram is turned upside down, the element described on the "below" side will become the element on the "above" side.

The terms "approximately," "equal to," "equal" or "same," "substantially" or "substantially" are generally interpreted as being within 20% of a given value or range, or within 10%, 5%, 3%, 2%, 1% or 0.5% of a given value or range.

In the present disclosure, when it is mentioned that element A overlaps element B, it is intended to include a situation where they at least partially overlap.

It is understood that, although the terms "first", "second", etc. may be used herein to describe various elements, layers and/or parts, these elements, layers and/or parts should not be limited by these terms, and these terms are only used to distinguish different elements, layers and/or parts. Therefore, a first element, layer and/or part discussed below may be referred to as a second element, layer and/or part without departing from the teachings of some embodiments disclosed herein. In addition, for the sake of brevity, the terms "first", "second", etc. may not be used in the specification to distinguish different elements. Without violating the scope defined by the attached patent scope, the first element and/or second element recorded in the patent scope may be interpreted as any element that meets the description in the specification.

It should be noted that the technical solutions provided in the following different embodiments can be replaced, combined or mixed with each other to constitute another embodiment without violating the spirit of the present disclosure.

Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by those of ordinary skill in the art to which this disclosure belongs. It is understood that these terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning consistent with the background or context of the relevant technology and this disclosure, and should not be interpreted in an idealized or overly formal manner, unless specifically defined herein.

Please refer to FIG. 1, which is a schematic diagram of a motor-driven integrated system 100 according to some embodiments of the present disclosure. The motor-driven integrated system 100 can be connected (e.g., electrically connected) to an external power source. For example, the motor-driven integrated system 100 can be connected to a mains 102 to supply the power required by the motor-driven integrated system 100.

The motor drive integrated system 100 may include a power module 110, a host controller 120, one or more buffer modules 130, and a plurality of motor drive integrated units 140.

It should be noted that, although FIG. 1 shows that the motor drive integrated system 100 includes three buffer modules 130, it should be understood that FIG. 1 is only an example of the present disclosure. In fact, the number of buffer modules 130 is not limited. For example, according to some embodiments of the present disclosure, the motor drive integrated system 100 may include one, two, three, four, or more buffer modules 130.

Similarly, although FIG. 1 shows that each buffer module 130 is connected to three motor-driven integrated machines 140, it should be understood that FIG. 1 is only an example of the present disclosure. In fact, the number of motor-driven integrated machines 140 to which each buffer module 130 can be connected is not limited. For example, according to some embodiments of the present disclosure, each buffer module 130 can be connected to one, two, three, four, or more motor-driven integrated machines 140.

The power module 110 may include an AC/DC rectifier 112, a soft start circuit 114, a DC/DC converter 116, and a communication circuit 118. Furthermore, the power module 110 may be connected (e.g., electrically connected) to an external power source (e.g., the mains 102), receive the external power source and convert the mains into a DC power source. More specifically, the AC voltage 111 inputted from the mains 102 to the power module 110 may be converted into a DC bus power 113 of a DC power source through the AC/DC rectifier 112 and the soft start circuit 114 of the power module 110.

The DC/DC converter 116 can receive the DC bus power 113 and convert the DC bus power 113 into a working voltage 115 required by the communication circuit 118 .

The power module 110 can also be connected (e.g., electrically connected) to the host controller 120 and the buffer module 130. The communication circuit 118 of the power module 110 is connected (e.g., electrically connected) to the host controller 120 and the buffer module 130, so that the power module 110 can communicate with the host controller 120 and the buffer module 130, and the host controller 120 can communicate with the buffer module 130 through the power module 110.

For example, the upper controller 120 can transmit the control signal and the command signal to the buffer module 130 through the communication circuit 118 of the power module 110 through the communication signal 121; and the buffer module 130 can also transmit the signal to the upper controller 120 through the communication circuit 118 of the power module 110.

The buffer module 130 may include a buffer capacitor 132 and a communication circuit 134.

The buffer capacitor 132 is electrically connected to the power module 110, receives the DC power, and filters the ripple voltage of the DC power. More specifically, the buffer module 130 filters the DC bus power 113 of the DC power, and the buffer capacitor 132 can be connected (e.g., electrically connected) to other buffer modules 130 to provide the DC bus power 113 to other buffer modules 130.

The buffer capacitor 132 may also be connected to one or more motor-driving integrated units 140 to provide the DC bus power 113 to the motor-driving integrated units 140.

The buffer capacitor 132 can also filter out the ripple voltage of the DC bus power supply 113 caused by the load of the motor-drive integrated unit 140, making the motor-drive integrated system 100 more stable.

The communication circuit 134 of the buffer module 130 can operate by the working voltage 115 provided by the power module 110. The communication circuit 134 can be connected to the power module 110, other buffer modules 130 and one or more motor drive integrated units 140 to communicate therewith.

The buffer module 130 can provide the working voltage 115 to the connected device after receiving the working voltage 115 provided by the power module 110. For example, the buffer module 130 can provide the working voltage 115 to the motor-driving integrated machine 140 and/or other buffer modules 130.

The motor-drive integrated unit 140 may include a motor 141 , a communication circuit 142 , a drive controller 144 , a DC/AC inverter 146 , and a filter capacitor 148 .

The motor-driver integrated unit 140 may receive the operating voltage 115 provided by the power module 110; or, in other words, the motor-driver integrated unit 140 may receive the operating voltage 115 from the buffer module 130.

The communication circuit 142 of the motor-driven integrated unit 140 can receive the control signal and the command signal of the upper controller 120 through the communication signal 121 to control the motor position or speed of the motor-driven integrated unit 140 .

After receiving the control signal and command signal from the host controller 120 , the drive controller 144 of the motor drive integrated unit 140 can control the DC/AC inverter 146 to output current and drive the motor 141 .

The filter capacitor 148 of the motor-driver integrated unit 140 can be connected to the DC bus power 113 of the buffer module 130 to provide power to the DC/AC inverter 146 in the motor-driver integrated unit 140 to filter out surge voltage caused by switching of the DC/AC inverter power switch.

It should be noted that according to some embodiments of the present disclosure, the internal working voltage and communication connection of the motor drive integrated system 100 of the present case can use power line communication and only use power line connection.

Therefore, the motor drive integrated system 100 in this case has fewer lines and simpler wiring, which can effectively reduce wire costs.

According to some embodiments of the present disclosure, the buffer module 130 may further include a DC/DC converter 136. The DC/DC converter 136 may effectively reduce the wiring of the working voltage between the power module 110 and the buffer module 130, and may more effectively reduce the wire cost.

According to some embodiments of the present disclosure, the motor-drive integrated unit 140 may further include a DC/DC converter 143. The DC/DC converter 143 may effectively reduce the wiring of the working voltage between the buffer module 130 and the motor-drive integrated unit 140, and may more effectively reduce the wire cost.

Please refer to FIG. 2, which is a cross-sectional view of a motor-driven integrated unit 200 according to some embodiments of the present disclosure. According to some embodiments of the present disclosure, the aforementioned motor-driven integrated unit 140 may be similar to or equal to the motor-driven integrated unit 200.

The motor-drive integrated machine 200 may include a motor 210 , a driver 220 , and a motor frame 230 .

The motor 210 may include a motor bearing 212 , a stator winding 214 , a rotor 216 , and a connecting plate 218 .

The driver 220 may include a power board 222 , a terminal block 224 , a position feedback device 226 , and a control board 228 .

The motor frame 230 may include a front cover 231 , a motor housing 232 , a rear cover 233 , a motor receiving slot 234 , a power board receiving slot 235 , and an opening 236 .

The front cover 231, the motor housing 232 and the rear cover 233 can form a receiving space to receive the components of the motor drive integrated machine 200. For example, the motor bearing 212, the stator winding 214, the rotor 216, the connecting plate 218, the power board 222, the terminal block 224 and the position feedback device 226 can be disposed in the receiving space.

The opening 236 can accommodate and install the terminal block 224. The power board receiving slot 235 can accommodate and install the power board 222, and the power board 222 can be electrically connected to the connecting board 218, and the connecting board 218 receives the DC bus power of the DC power source through the terminal block 224.

The motor bearing 212 includes a front bearing 2121 and a rear bearing 2122. The front bearing 2121 can be fixed on the front end cover 231 of the motor frame 230, and the rear bearing 2122 can be fixed on the motor housing 232 of the motor frame 230.

The rotor 216 may be supported on the motor bearing 212. The position feedback device 226 may include a magnetic sensor or an optical sensor, and the magnetic sensor or the optical sensor may be fixed on the rotor 216. Therefore, the position feedback device 226 may rotate synchronously with the motor bearing 212.

The ends of the stator winding 214 can be welded to the connection plate 218, and the stator winding 214 can receive a three-phase AC power supply. According to some embodiments of the present disclosure, the stator winding 214 can be a single set or multiple sets of parallel windings, and the stator winding 214 can be connected through the winding lines of the connection plate 218.

The motor accommodating groove 234 can accommodate and install the motor 210 , and the motor accommodating groove 234 can expose the connecting plate 218 .

According to some embodiments of the present disclosure, the control board 228 can be connected (e.g., electrically connected) to an external upper controller (e.g., the aforementioned upper controller 120) of the motor-driven integrated machine 200, and the control board 228 can receive a speed command or a position command from the upper controller through a communication circuit and return the motor status to the upper controller.

The control board 228 can also be connected (eg, electrically connected) to an external power source of the motor-driven integrated unit 200 (eg, the operating voltage 115 of the power module 110 mentioned above) to provide the required operating voltage (eg, the operating voltage 115 mentioned above) to the motor-driven integrated unit 200.

According to some embodiments of the present disclosure, the control board 228 may include a position feedback circuit (not shown), which can detect the magnetic signal or optical signal generated by the magnetic sensor or optical sensor of the position feedback device 226 to obtain the motor position information.

According to some embodiments of the present disclosure, the control board 228 may also be connected to the power board 222 to receive voltage and current feedback signals into a driver controller (not shown) of the control board 228. Furthermore, the driver controller may calculate a pulse-width modulation (PWM) signal to transmit the pulse-width modulation signal to the power board 222.

Since the motor-driven integrated machine 200 disclosed in the present invention includes the position feedback device 226 and the drive controller, the position feedback device 226 and the drive controller do not need additional wiring. Therefore, the motor-driven integrated machine 200 disclosed in the present invention can simplify wiring and effectively reduce wire material costs.

The power board 222 may include a DC/AC inverter (not shown). The DC/AC inverter may receive a DC bus power supply (e.g., the aforementioned DC bus power supply 113) from the connection board 218, and the DC/AC inverter may receive a pulse width modulation signal output by the control board 228 to convert the DC power into AC power and provide it to the connection board 218, and then to the stator winding 214.

According to some embodiments of the present disclosure, the power board 222 may contact the motor housing 232 through a heat dissipation material to transfer heat energy generated by the DC/AC inverter of the power board 222 due to power crystal loss to the motor housing 232 for heat dissipation.

Therefore, the power board 222 of the present invention does not need to dissipate heat through the fin heat sink of the rear end cover 233. In this way, the volume of the motor-driven integrated unit 200 can be reduced, and the degree of freedom of arrangement of the internal components of the motor-driven integrated unit 200 can also be increased.

According to some embodiments of the present disclosure, the power board 222 may further include a voltage and current feedback circuit that can detect the voltage of the DC bus power source and the AC output current and feed them back to the control board 228.

Referring to FIG. 2 , according to some embodiments of the present disclosure, the power board 222 may be disposed adjacent to the connection board 218. For example, the power board 222 may be disposed facing the connection board 218. Furthermore, the power board 222 and the connection board 218 may be directly connected via a connector (not shown). More specifically, the connector may be a board-to-board connector.

In this way, the wiring between the power board 222 and the connection board 218 can be simplified, and the wire cost can be effectively reduced and space can be saved.

The connection board 218 can receive a voltage (e.g., the aforementioned DC bus power supply 113) provided by the outside of the motor-driven integrated unit 200 (e.g., the aforementioned buffer module 130). In addition, the connection board 218 can include a filter capacitor (not shown). The filter capacitor can filter out the ripple voltage, and the connection board 218 can transmit the DC bus power supply 113 to the power board 222 after filtering out the ripple voltage. In this way, the motor-driven integrated unit 200 can be made more stable.

Please refer to FIG. 3, which is a schematic diagram of a power board 222 according to some embodiments of the present disclosure. As shown in FIG. 3, the power board 222 may not be continuous. For example, the power board 222 may have a gap 2221.

The gap 2221 may extend from the center to the edge of the power board 222, so that the power board 222 is not continuous. According to some embodiments of the present disclosure, the power board 222 may be a C-shaped metal substrate.

In this way, the magnetic field generated when the motor drives the integrated machine 200 to rotate can be prevented from causing eddy current, and electromagnetic interference can be reduced.

It should be noted that the features of the various embodiments of the present disclosure may be mixed and matched as long as they do not violate the spirit of the invention or conflict with each other.

Although the embodiments and advantages of the present disclosure have been described above, it should be understood that a person skilled in the art may make various changes, substitutions and modifications to the present disclosure without departing from the spirit and scope of the present disclosure. It should be noted that different embodiments may be arbitrarily combined into other embodiments as long as the combination conforms to the spirit of the present disclosure. In addition, the scope of the present disclosure is not limited to the processes, machines, manufactures, compositions, devices, methods and steps in the specific embodiments described in the specification. A person skilled in the art may understand existing or developing processes, machines, manufactures, compositions, devices, methods and steps from some embodiments of the present disclosure. Therefore, the scope of the present disclosure includes the aforementioned processes, machines, manufactures, compositions, devices, methods and steps. In addition, each of the appended claims constitutes a separate embodiment, and the scope of the present disclosure includes every combination of the appended claims and embodiments.

100: Motor drive integrated system 102: Mains 110: Power module 111: AC voltage 112: AC/DC rectifier 113: DC bus power 114: Soft start circuit 115: Working voltage 116: DC/DC converter 118: Communication circuit 120: Host controller 121: Communication signal 130: Buffer module 132: Buffer capacitor 134: Communication circuit 136: DC/DC converter 140: Motor drive integrated machine 141: Motor 142: Communication circuit 144: Drive controller 146: DC/AC inverter 148: filter capacitor 200: motor-drive integrated machine 210: motor 212: motor bearing 214: stator winding 216: rotor 218: connection plate 220: driver 222: power board 224: terminal block 226: position feedback device 228: control board 230: motor frame 231: front cover 232: motor housing 233: rear cover 234: motor receiving slot 235: power board receiving slot 236: opening 2121: front bearing 2122: rear bearing 2221: gap

Although this specification concludes with patent claims specifically pointing out and explicitly claiming the scope of the claims as the rights of the disclosed embodiments, the advantages of the disclosed embodiments can be more easily ascertained from the description of certain examples of the disclosed embodiments when read in conjunction with the accompanying illustrations, wherein: FIG. 1 is a schematic diagram of a motor drive integrated system according to some embodiments of the disclosed embodiments. FIG. 2 is a cross-sectional view of a motor drive integrated machine according to some embodiments of the disclosed embodiments. FIG. 3 is a schematic diagram of a power board according to some embodiments of the disclosed embodiments.

100: Motor drive integrated system

102: City electricity

110: Power module

111: AC voltage

112: AC/DC rectifier

113: DC bus power supply

114: Soft start circuit

115: Working voltage

116: DC/DC converter

118: Communication circuit

120: Host controller

121: Communication signal

130: Buffer module

132: Buffer capacitor

134: Communication circuit

136: DC/DC converter

140: Motor drive all-in-one machine

141: Motor

142: Communication circuit

143: DC/DC converter

144:Drive controller

146: DC/AC inverter

148: Filter capacitor

Claims (9)

A motor drive integrated system is suitable for being electrically connected to an external power source for use. The motor drive integrated system includes: a host controller; a power module electrically connected to the host controller, receiving the external power source and converting the external power source into a DC power source, and converting the DC power source into a working voltage; a buffer module electrically connected to the power module, receiving the DC power source, filtering the ripple voltage of the DC power source, and receiving the working voltage; and a plurality of motor drive integrated machines electrically connected to the buffer module, and receiving the DC power source. The motor-driven integrated machine comprises: a motor including a connection board; a driver including: a power board arranged adjacent to the connection board; and a terminal block, wherein the connection board receives a DC bus power supply of the DC power supply through the terminal block; and a motor frame including: a motor receiving slot accommodating the motor and exposing the connection board; a power board accommodating slot accommodating the power board and electrically connecting the power board to the connection board; and an opening accommodating the terminal block. As in claim 1, the motor drive integrated system, wherein the driver further includes a control board, connecting the working voltage and the power board. As in claim 2, the motor drive integrated system, wherein the control board is connected to the upper controller, and the control board receives speed or position commands and returns the status of the motor through the communication circuit. As in claim 2, the motor drive integrated system, wherein the driver further includes a position feedback device, and a position feedback circuit of the control board detects a magnetic signal or an optical signal of the position feedback device to obtain motor position information. A motor drive integrated system as claimed in claim 1, wherein the power board includes a DC/AC inverter. A motor drive integrated system as claimed in claim 1, wherein the power board includes a voltage and current feedback circuit. As in claim 1, the motor drive integrated system, wherein the power board has a gap so that the board surface of the power board is discontinuous. A motor drive integrated system as claimed in claim 1, wherein the connection board includes a filter capacitor, and the connection board receives a DC bus power provided by the buffer module. A motor drive integrated system as claimed in claim 1, wherein the heat energy of the power board is transferred to the motor frame.