TWI482419B - Motor control system and method and brake device - Google Patents

Description

Motor control system and method thereof and brake device

The invention relates to a motor, and more particularly to a motor control system and method therefor and a brake device.

According to the motor, the motor is an important standard industrial product, mainly used in many different industrial or scientific fields such as steam, locomotive and machinery. At the beginning of the invention of the motor, it was mainly hoped that a stable rotation rate could be provided to drive an object to move or rotate. As industrial development progresses, fixed-rate motors cannot be adapted to different environments or occasions due to their singularity of speed. Therefore, some manufacturers have suggested that the motor supply voltage, current or voltage can be changed through a motor brake. It is the frequency to adjust the speed of the motor to meet the needs of different environments.

However, the above-mentioned motor brakes and the control components and the motor need not only transmit power through the power supply line, but also require other additional wires to transmit signals for controlling the motor, which increases the complexity of the design configuration. In addition, when the user wants to monitor the running state of the motor in real time, the wiring of the wires between the components will be more complicated, which not only causes an increase in the installation cost, but also causes a wiring error to be inoperable, and may even result in The motor burned. Therefore, the design of the known motor control system is still not perfect, and there is still room for improvement.

In view of the above, the main object of the present invention is to provide a motor control system, a method thereof and a brake device, which are capable of transmitting power and electrical control signals required for transmission through a power line, thereby greatly reducing the complexity of wiring and wiring.

In order to achieve the above object, a motor control system provided by the present invention is for controlling a motor through a power line, and the power line carries a power source; the motor control system includes a control device and a brake device; wherein the control device has Electrically connecting a controller and a first communication module, the controller is configured to input a control command, and convert the control command into an electrical control signal, and output the same; the first communication module is connected to the power line, and is used for Receiving the electrical control signal and outputting the electrical control signal to the power line; the braking device has a second communication module and a motor brake electrically connected, and the second communication module is connected to the power line, and the motor brake Connecting the motor; the second communication module is configured to capture the electrical control signal from the power line, and parse the electrical control signal to obtain a control command represented by the electrical control signal, and then control the motor brake according to the control command The power is supplied to the motor after conversion.

According to the above concept, the present invention further provides a control method comprising the following steps:

A. inputting a control command and converting the control command into an electrical control signal;

B. outputting the electrical control signal to the power line;

C. taking electrical control signals on the power line and receiving the power supply;

D. Parsing the electrical control signal to obtain the control command, and converting the received power source to the motor according to the control command.

According to the above concept, the present invention further provides a braking device for receiving a power supply and an electrical control signal on a power line, and controlling a motor according to the electrical control signal; the braking device includes a motor brake and a communication module The motor brake is connected to the motor; the communication module is configured to capture the electrical control signal from the power line, and parse the electrical control signal to obtain a control command represented by the electrical control signal, and control the control according to the control command The motor brake converts the received power to the motor.

In order that the present invention may be more clearly described, the preferred embodiments are illustrated in the accompanying drawings.

Please refer to FIG. 1 , which is a motor control system 1 for controlling the operation of the brushless motor 200 through a power line 100 , and the power line 100 carries the power required for the motor control system 1 to operate. In this embodiment, the power source is a 60 Hz alternating current, but is not limited thereto.

The motor control system 1 includes a control device 10 and a brake device 20. The control device 10 includes a controller 12 and a first communication module 14 that are electrically connected. Referring to FIG. 2, the control device includes an input device 121, a digital signal processor (DSP) 122, and a display device 123. In the embodiment, the input device 121 is a keyboard, but may be other devices such as a mouse or a governor for inputting a control command by a user. The digital signal processor 122 is configured to convert the control command into a digitized electrical control signal for output. The display device 123 is configured to display a control command input by the user. In addition, the controller 12 of the present invention is not limited to the above components, and the controller 12 can also be replaced by an industrial computer, a personal computer, an embedded controller, or other controllers.

The first communication module 14 is connected to the power line 100 for receiving the electrical control signal output by the controller 12 and outputting the electrical control signal to the power line 100. The first communication module 14 mainly includes a first processor 141, a first digital analog converter (DAC) 142, a first low-pass filter (LPF) 143, and a first communication module. A first programmable gain driver (PGD) 144 and a first coupling transformer 145. The first processor 141 is configured to control the first digital analog converter 142 to convert the electrical control signal from the digital signal to the analog signal when the first communication module 14 receives the electrical control signal output by the controller 12. The first low pass filter 143 filters out the non-low frequency noise in the analog electrical control signal outputted by the first digital analog converter 142 and outputs the noise to the first programmable gain driver 144. The first programmable gain driver 144 stabilizes the analog electrical control signal output by the first low pass filter 143 by adjusting the gain, and is coupled to the power line 100 through the first coupling transformer 145. In addition, a first coupling capacitor 146 is disposed between the first coupling transformer 145 and the power line 100 for isolating the direct current and the low frequency alternating current, so that the first coupling transformer 145 can be more stable when coupled to the input or output.

The brake device 20 includes a motor brake 22 and a second communication module 24. Referring to FIG. 3 , the motor brake 22 is coupled to the brushless DC motor 200 and includes a power conversion circuit 221 and a driving circuit 222 . The power conversion circuit 221 is configured to convert the received alternating current into direct current, and output the direct current to the direct current brushless motor 200 through the driving circuit 222, thereby driving the direct current brushless motor 200 to operate.

The second communication module 24 is connected to the power line 100 for receiving power on the power line 100 and extracting the analogized electrical control signal from the power line 100. The second communication module 24 includes a second coupling transformer 241, a second band-pass filter (BPF) 242, a second programmable gain amplifier (PGA) 243, and a second A second analog digital converter (ADC) 244 and a second processor 245. The second band pass filter 242 passes through the second coupling transformer 241 and extracts the analogized electrical control signal on the power line 100 by filtering out a signal outside a predetermined frequency band, and outputs the analog control signal to the second programmable Gain amplifier 243. The second programmable gain amplifier 243 stabilizes the electrical control signal analogized by the second band pass filter 242 by adjusting the gain, and outputs the analog control signal to the second analog-to-digital converter 244. The second analog-to-digital converter 244 converts the electrical control signal from the analog signal to the digital signal and outputs the electrical control signal to the second processor 245. The second processor 245 analyzes the electrical control signal to obtain a corresponding control command, and then controls the power conversion circuit 221 to convert the power to a direct current corresponding to the voltage and current of the control command according to the control command, and transmits the DC power through the driving circuit 222. The DC signal is supplied to the DC brushless motor 200, and the DC brushless motor 200 is controlled to operate. In addition, a second coupling capacitor 246 is also disposed between the second coupling transformer 241 and the power line 100 to make the second coupling transformer 241 more stable when coupled to the input or output.

Thereby, the operation of the DC brushless motor 200 is controlled by the motor control system 1 described above, which mainly comprises the following steps:

A. using the controller 12 to input a control command, and converting the control command into an electrical control signal;

B. The first communication module 14 outputs the electrical control signal to the power line 100;

Receiving the power supply, and using the second communication module 24 to extract the electrical control signal on the power line 100;

D. The electrical control signal is parsed to obtain the control command, and the motor driver 22 is controlled to convert the received power to a corresponding direct current according to the control command, and then supplied to the DC brushless motor 200.

In addition, in the above steps, the first digital analog converter 142 is used to convert the electrical control signal from the digital signal to the analog signal after step A. and before step B. And after step C., before step D., the second analog-to-digital converter 244 is used to convert the electrical control signal from the analog signal to a digital signal.

Therefore, the present invention can utilize the power line 100 of the transmission power source to simultaneously transmit the electrical control signals to achieve the purpose of driving and controlling the motor, and can greatly reduce the complexity of wiring and wiring.

It is to be noted that the second communication module 24 of the braking device 20 of the present invention can be used to instantly detect the operating state of the DC brushless motor 200 through the motor brake 22, and generate a return signal output to the power line 100 accordingly. . The first communication module 14 of the control device 10 is further configured to capture the reward signal from the power line 100 and transmit the reward signal to the controller 12. After the controller 12 analyzes the reward signal, it can be displayed on the display device 123 for the user to monitor the running state of the DC brushless motor 200 in real time.

For the above purpose, referring to FIG. 2 and FIG. 3, the second communication module 24 of the present invention further includes a second digital analog converter (DAC) 247 and a second low pass filter (Low- Pass Filter, LPF) 248 and a second Programmable Gain Driver (PGD) 249. The first communication module 14 further includes a first Band-Pass Filter (BPF) 147, a first Programmable Gain Amplifier (PGA) 148, and a first analog-to-digital converter. (Analog Digital Converter, ADC) 149. The second processor 245 of the second communication module 24 detects the operating state of the DC brushless motor 200 through the motor brake 22, and generates a digitalized return signal, and uses the second digital analog converter. 247 converts the return signal from a digital signal to an analog signal and outputs it. The second low pass filter 248 filters out the non-low frequency noise in the analog signal of the analog output of the second digital analog converter 247, and outputs the noise to the second programmable gain driver 249; the second The program gain driver 249 stabilizes the analog signal of the output of the second low-pass filter 248 by adjusting the gain, and outputs the signal to the power line 100 through the second coupling transformer 241.

The first band pass filter 147 of the first communication module 14 transmits the analogized response signal on the power line 100 through the first coupling transformer 145 and filters out signals outside a predetermined frequency band, and outputs the same. To the first programmable gain amplifier 148. The first programmable gain amplifier 148 stabilizes the analog signal captured by the first band pass filter 147 by adjusting the gain, and outputs the analog signal to the first analog converter 149. The first analog-to-digital converter 149 converts the reward signal from the analog signal to the digital signal and transmits it to the controller 12.

After receiving the report signal, the controller 12 analyzes the signal by the digital signal processor 122, and displays the operation state of the DC brushless motor 200 on the display device 123 after analysis, for the user to immediately check for monitor.

In addition, in order to provide the user with the purpose of remote remote control, please refer to FIG. 4, and further add a group of remote control devices 30 under the architecture of FIG. 1, and the architecture of the remote control device 30 and the control device 10 is the same, and is not described here. The difference from the above embodiment is that the remote control device 30 and the controller 12 of the control device 10 are respectively provided with a communication interface (not shown) for connecting through the Internet. The road, I2C, UART or SPI or other communication means communicate with each other for the user to monitor the operation of the motor at the remote end through the remote control unit 30.

It is to be noted that the braking device 20 of the present invention is integrated on the DC brushless motor 200, thereby effectively reducing the volume of the motor control system 1, but not limited thereto, and may be separated according to the setting environment or requirements. Settings.

In addition, in addition to the remote control by the control device 10, the motor control system 1 of the present invention can also directly add another control device to the motor to achieve the purpose of near-end control.

Furthermore, the motor control system 1 of the present invention is not only used to control the DC brushless motor 200, but also to replace the motor brake as needed to control a stepping motor, a variable frequency motor or other types of motors.

Moreover, the circuit architecture described above is only one embodiment of the present invention, and is not limited thereto. As long as it is used for signal transmission through the power line 100 by using the above technology, it is also another aspect of the present invention. Implement the situation.

The above description is only for the preferred embodiments of the present invention, and the equivalent structures and manufacturing methods of the present invention and the scope of the patent application are intended to be included in the scope of the present invention.

1. . . Motor control system

10. . . Control device

12. . . Controller

121. . . Input device

122. . . Digital signal processor

123. . . Display device

14. . . First communication module

141. . . First processor

142. . . First digital analog converter

143. . . First low pass filter

144. . . First programmable gain driver

145. . . First coupling transformer

146. . . First coupling capacitor

147. . . First bandpass filter

148. . . First programmable gain amplifier

149. . . First analog digital converter

20‧‧‧ brakes

22‧‧‧Motor brake

221‧‧‧Power conversion circuit

222‧‧‧ drive circuit

24‧‧‧Second communication module

241‧‧‧Second coupling transformer

242‧‧‧Second bandpass filter

243‧‧‧Second programmable gain amplifier

244‧‧‧Second analog-to-digital converter

245‧‧‧second processor

246‧‧‧Second coupling capacitor

247‧‧‧Second digital analog converter

248‧‧‧Second low pass filter

249‧‧‧Second programmable gain driver

30‧‧‧Remote control device

100‧‧‧Power line

200‧‧‧DC brushless motor

1 is a block diagram of a motor control system in accordance with a first preferred embodiment of the present invention.

Figure 2 is a block diagram of a control device in accordance with a preferred embodiment of the present invention.

Figure 3 is a block diagram of a brake device in accordance with a preferred embodiment of the present invention.

4 is a block diagram of a motor moving system in accordance with a second preferred embodiment of the present invention.

1. . . Motor control system

10. . . Control device

12. . . Controller

14. . . First communication module

20. . . Braking device

twenty two. . . Motor brake

twenty four. . . Second communication module

100. . . power line

200. . . DC brushless motor

Claims (18)

A motor control system for controlling a motor through a power line, and the power line carries a power source; the motor control system comprises: a control device, a controller having an electrical connection, and a first communication module, the controller is used for And inputting a control command, and converting the control command into an electrical control signal; the first communication module is connected to the power line, and is configured to receive the electrical control signal, and output the electrical control signal to the power line to The power line can simultaneously carry the electrical control signal and the power source; and a braking device having a second communication module and a motor brake electrically connected, and the second communication module is connected to the power line, and the motor brake Connecting the motor; the second communication module is configured to capture the electrical control signal from the power line, and parse the electrical control signal to obtain a control command represented by the electrical control signal, and then control the motor brake according to the control command The power is supplied to the motor after conversion. The motor control system of claim 1, wherein the motor is a brushless motor; the motor brake of the brake device includes a power conversion circuit and a drive circuit; and the second communication module of the brake device is The control command controls the power conversion circuit to convert the power source into a DC signal corresponding to the voltage and current of the control command, and the DC signal is supplied to the DC brushless motor through the driving circuit. The motor control system of claim 1, wherein the controller outputs an electrical control signal coefficient bit signal, and the first communication module includes a first processor and a first digital analog converter (Digital Analog Converter) , DAC), The first processor is configured to control the first digital analog converter to convert the electrical control signal from the digital signal to the analog signal to output to the power line when the first communication module receives the electrical control signal output by the controller; In addition, the second communication module includes a second analog digital converter (ADC) and a second processor, and the second analog-to-digital converter is configured to capture the electrical control signal on the power line. The analog signal is converted into a digital signal and output to the second processor. The second processor is configured to parse the electrical control signal and thereby control the motor brake. The motor control system of claim 3, wherein the first communication module further comprises a first low-pass filter (LPF) and a first programmable gain driver (PGD). And a first coupling transformer, the first low-pass filter is configured to filter the analog noise of the electrical control signal outputted by the first digital analog converter output to the first programmable gain driver; The first programmable gain driver stabilizes the analog control signal of the first low-pass filter output by adjusting a gain, and outputs the electrical control signal to the power line through the first coupling transformer; and the second communication module further a second coupling transformer, a second Band-Pass Filter (BPF), and a second programmable gain amplifier (PGA), the second band pass filter is configured to transmit the second Coupling a transformer and extracting the analog electrical control signal on the power line by filtering out a signal outside a predetermined frequency band, and outputting the analog control signal to the second programmable gain amplifier The second programmable gain amplifier stabilizes the electrical control of the analogization of the second band pass filter by adjusting the gain The signal is output to the second analog to digital converter. The motor control system of claim 1, wherein the second communication module of the brake device can automatically detect the operating state of the motor through the motor brake, and generate a return signal output to the power line; The first communication module of the control device can further capture the reward signal from the power line and transmit the reward signal to the controller; the controller can further analyze the return signal to monitor the running state of the motor in real time. The motor control system of claim 5, wherein the second communication module comprises a second processor and a second digital analog converter (DAC), the second processor is configured to transmit the motor The brake immediately detects the running state of the motor to generate the digitalized return signal; the second digital analog converter converts the return signal from the digital signal to the analog signal for output to the power line; and the first communication mode The group includes a first processor and a first analog digital converter (ADC), the first processor is configured to: when the second communication module captures the analogized return signal from the power line Controlling the first analog-to-digital converter to convert the return signal from the analog signal to a digital signal and transmitting the signal to the controller. The motor control system of claim 6, wherein the second communication module further comprises a second low-pass filter (LPF) and a second programmable gain driver (PGD). And a second coupling transformer, the second low-pass filter is configured to filter the analog signal of the second digital analog converter output and output the noise to the second programmable gain driver; The second programmable gain driver stabilizes the analog signal of the second low-pass filter output by adjusting the gain, and outputs the signal to the power line through the second coupling transformer; and the first communication module further a first coupling transformer, a first band-pass filter (BPF), and a first programmable gain amplifier (PGA), the first band pass filter is configured to transmit the first Coupling the transformer and extracting the analogized signal of the power line by filtering out a signal outside the predetermined frequency band, and outputting the analog signal to the first programmable gain amplifier; the first programmable gain amplifier is configured to adjust the gain The method stabilizes the electrical control signal analogized by the first band pass filter and outputs the electrical control signal to the first analog digital converter. A braking device for receiving a power supply and an electrical control signal on a power line, and controlling a motor according to the electrical control signal; the braking device comprises: a motor brake connected to the motor; and a communication module for The electrical control signal is captured by the power line, and the electrical control signal is analyzed to obtain a control command represented by the electrical control signal, and the motor brake is controlled to convert the received power to the motor according to the control command. The brake device of claim 8, wherein the motor is a brushless motor; the motor brake of the brake device includes a power conversion circuit and a drive circuit; and the communication module controls the power conversion according to the control command The circuit converts the power source into a DC signal corresponding to the voltage and current of the control command, and transmits The driving circuit supplies the DC signal to the DC brushless motor. The braking device of claim 8, wherein the electrical control signal on the power line is an analog signal; the communication module includes an analog digital converter (ADC) and a processor, the analog converter is The electrical control signal captured by the power line is converted into a digital signal by an analog signal and output to the processor, and the processor is configured to parse the electrical control signal and control the motor brake accordingly. The braking device of claim 10, wherein the communication module further comprises a coupling transformer, a band-pass filter (BPF), and a programmable gain amplifier (PGA). Passing through the coupling transformer and extracting the analog electrical control signal on the power line by filtering out signals outside a predetermined frequency band, and outputting the electrical control signal to the programmable gain amplifier; the programmable gain amplifier is transmitted through The analog gain is stabilized by the bandpass filter and output to the analog to digital converter. The brake device of claim 8, wherein the communication module is further configured to immediately detect the operating state of the motor through the motor brake, and generate a return signal to output the power line. The brake device of claim 12, wherein the communication module includes a processor and a digital analog converter (DAC) for instantly detecting the operating state of the motor through the motor brake. And generating the digitalized return signal; the digital analog converter is used to report the reward The signal is converted into an analog signal by a digital signal for output to the power line. The braking device of claim 13, wherein the communication module further comprises a Low-Pass Filter (LPF), a Programmable Gain Driver (PGD), and a coupling transformer. The low pass filter filters the noise of the analog signal of the digital analog converter output and outputs the noise to the programmable gain driver; the programmable gain driver stabilizes the low pass filter output by adjusting the gain The analogy of the return signal is output to the power line through the coupling transformer. A control method is to control a motor through a power line, and the power line carries a power source; the method comprises the following steps: A. inputting a control command, and converting the control command into an electrical control signal; B. outputting the electrical control Signaling to the power line; C. extracting the electrical control signal on the power line and receiving the power; D. analyzing the electrical control signal to obtain the control command, and converting the received power to the control according to the control command motor. The control method of claim 15, wherein the motor is a brushless motor, and in step D., the received power is converted into a direct current corresponding to the voltage and current of the control command according to the control command. The DC power is supplied to the motor. The control method according to claim 15, wherein the electrical control signal is a digital signal in step A., and the electrical control signal is converted from the digital signal to the analog signal after step A. and before step B. The control method described in claim 16 converts the electrical control signal from the analog signal to a digital signal after step C. and before step D.