CN213342055U - Band-type brake control circuit, driver circuit, motor driver and motor control system - Google Patents
Band-type brake control circuit, driver circuit, motor driver and motor control system Download PDFInfo
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- CN213342055U CN213342055U CN202021965963.2U CN202021965963U CN213342055U CN 213342055 U CN213342055 U CN 213342055U CN 202021965963 U CN202021965963 U CN 202021965963U CN 213342055 U CN213342055 U CN 213342055U
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Abstract
The utility model provides a band-type brake control circuit, driver circuit, motor drive and motor control system, band-type brake control circuit include the band-type brake interface, and first end (11) of band-type brake interface are connected with the power, and second end (12) of band-type brake interface are connected with ground through switch unit (13), and when switch unit (13) switched on, second end (12) ground connection; the switch unit (13) is connected with the control unit (15), and the control unit (15) controls the switch unit (13) to be switched on or off; the power is still connected with steady voltage current-expanding circuit (14), and steady voltage current-expanding circuit (14) are through control unit (15) linked switch unit (13), and after control unit (15) received corresponding control signal, steady voltage current-expanding circuit (14) drive switch unit (13) switched on, and the band-type brake device loosens, has realized reliable and stable band-type brake control, and has occupied small, can be placed in motor driver inside.
Description
Technical Field
The utility model relates to a motor control field particularly, relates to a band-type brake control circuit, driver circuit, motor driver and motor control system.
Background
In automation control, a motor is often used for carrying objects, and if the motor is suddenly powered off, in order to avoid danger caused by self-falling of heavy objects, a mechanical braking device is adopted to stop the motor in actual production activities. The electromagnetic band-type brake device is a device capable of stopping the motor, and the motor is tightly held by elements such as an electromagnetic effect and a brake shoe, so that the motor cannot operate, and the purpose of the electromagnetic band-type brake is achieved.
The electromagnetic band-type brake device is usually installed at the tail of the motor, a band-type brake coil works by depending on a direct-current power supply, when the direct-current power supply is provided for the electromagnetic band-type brake device, a brake of the electromagnetic band-type brake device is opened, the motor normally runs, and if the power supply is cut off, the brake acts to lock the motor, so that the motor is prevented from continuing to act.
In the related art, a user sets up a control unit by himself to control the band-type brake coil, and the control unit in the related art is complex and poor in reliability.
SUMMERY OF THE UTILITY MODEL
The utility model provides a band-type brake control circuit, driver circuit, motor driver and motor control system, the technical problem of main solution is that the user need build external control unit in the correlation technique, and the control unit is complicated, and the reliability is poor.
In order to solve the technical problem, an embodiment of the present invention provides a band-type brake control circuit, which includes a band-type brake interface, wherein a first end of the band-type brake interface is connected to a power supply, a second end of the band-type brake interface is connected to ground through a switch unit, and when the switch unit is turned on, the second end is grounded; the switch unit is connected with the control unit, and the control unit controls the switch unit to be switched on or off; the power supply is also connected with a voltage-stabilizing current-expanding circuit, the voltage-stabilizing current-expanding circuit is connected with the switch unit through the control unit, and when the control unit receives a corresponding control signal, the voltage-stabilizing current-expanding circuit provides current to drive the switch unit to be conducted; the band-type brake device is connected with the band-type brake interface, and when the switch unit is switched on, the band-type brake device is loosened.
Optionally, the switch unit includes a field effect transistor, a control end of the field effect transistor is connected with the control unit, an input end of the field effect transistor is connected with the second end of the band-type brake interface, and an output end of the field effect transistor is grounded.
Optionally, the field effect transistor includes an N-channel enhancement type field effect transistor; the grid electrode of the N-channel enhanced field effect transistor is the control end and is connected with the control unit; the drain electrode of the N-channel enhanced field effect transistor is the input end and is connected with the second end of the band-type brake interface; and the source electrode of the N-channel enhanced field effect transistor is the output end, and the source electrode is grounded.
Optionally, the switch unit further includes a first resistor, one end of which is connected to the gate of the fet, and the other end of which is connected to the source of the fet.
Optionally, the control unit includes an isolation circuit, and the control signal controls the switch unit to be turned on or off through the isolation circuit.
Optionally, the voltage-stabilizing current-expanding circuit includes a triode, the triode is an NPN-type triode, a base of the triode is connected to the power supply through a second resistor, a collector of the triode is directly connected to the power supply, an emitter of the triode is connected to the control unit through a third resistor, and the emitter of the triode is connected to the switching unit through the control unit; and the voltage stabilizing diode is connected between the base electrode of the triode and the second resistor at the cathode, and the anode of the voltage stabilizing diode is grounded.
Optionally, the band-type brake further comprises a protection diode, the cathode of the protection diode is grounded, the grounded ends of the grounded components in the band-type brake control circuit are connected with the anode of the protection diode together and grounded through the protection diode,
or the like, or, alternatively,
the anode of the protection diode is directly connected with the power supply, and all components connected with the power supply in the band-type brake control circuit are connected with the cathode of the protection diode together and are connected with the power supply through the protection diode.
On the other hand, the utility model provides a driver circuit still, driver circuit includes as above band-type brake control circuit to and the braking energy bleeder circuit of being connected with motor drive's generating line, the energy that produces when braking energy bleeder circuit is used for consuming the motor braking.
On the other hand, the utility model also provides a motor drive, include as above any kind of band-type brake control circuit.
On the other hand, the utility model provides a motor control system, include as above motor drive and with the band-type brake formula motor that motor drive connects, band-type brake formula motor includes the band-type brake device, the band-type brake device with band-type brake control circuit the band-type brake interface is connected and receives band-type brake control circuit's control.
Has the advantages that:
the utility model provides a band-type brake control circuit is equipped with the band-type brake interface of being connected with the band-type brake device, and the installation is simple, through the control unit control switch unit, and is equipped with the steady voltage and expands the circuit and provide stable current drive for the switch unit, and band-type brake control circuit's control is reliable and stable. Meanwhile, the band-type brake control circuit is simple, the occupied size is small, the band-type brake control circuit can be well arranged in the motor driver in some implementation processes, and a user does not need to build a complex external circuit by himself when using the band-type brake control circuit, and the band-type brake device can be directly connected with a band-type brake interface of the band-type brake control circuit in the motor driver.
Drawings
Fig. 1 is a schematic structural diagram of an internal contracting brake control circuit provided in an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a switch unit according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a driver circuit according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a motor driver and a system according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of another motor driver and system according to an embodiment of the present invention;
fig. 6 is a circuit diagram of a band-type brake control circuit according to an embodiment of the present invention;
description of reference numerals:
10-a band-type brake control circuit; 11-a first end; 12-a second end; 13-a switching unit; 14-a voltage stabilizing current-expanding circuit; 15-a control unit; 21-bus capacitance; 22-transient diode; 23-resistance; 100-a motor drive; 200-band-type brake motor; r 1-first resistance; r 2-second resistance; r 3-third resistance; r 4-fourth resistor; q 1-field effect transistor; q 2-triode; d 1-zener diode; d 2-protection diode; u 1-optical coupling unit; and c, a DSP controller.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the embodiments of the present invention are described in further detail below with reference to the accompanying drawings by way of specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example (b):
referring to fig. 1, the band-type brake control circuit of the present embodiment includes a band-type brake interface, a first end 11 of the band-type brake interface is connected to a power supply, a second end 12 of the band-type brake interface is connected to ground through a switch unit 13, and when the switch unit 13 is turned on, the second end 12 is grounded; the switch unit 13 is connected with the control unit 15, and the control unit 15 controls the switch unit 13 to be switched on or off; the power supply is also connected with a voltage-stabilizing current-expanding circuit 14, the voltage-stabilizing current-expanding circuit 14 is connected with the switch unit 13 through a control unit 15, and when the control unit 15 receives a corresponding control signal, the voltage-stabilizing current-expanding circuit 14 provides current to drive the switch unit 13 to be conducted; the contracting brake device is connected with the contracting brake interface, and when the switch unit 13 is switched on, the contracting brake device is released.
It can be understood that, the band-type brake interface in this embodiment is used for connecting the band-type brake device, and when the band-type brake control circuit of this embodiment is used, the band-type brake device can directly dock with the band-type brake interface, and the installation of the band-type brake device is simple and reliable. When the band-type brake interface is connected with the band-type brake device and the switch unit is switched on, the current of the power supply sequentially passes through the first end of the band-type brake interface, the second end of the band-type brake interface and the switch unit, and finally the current enters the ground wire. The voltage-stabilizing current-expanding circuit enables the switch unit to be driven stably and reliably, and ensures the reliability and stability of control. Meanwhile, the band-type brake control circuit in the embodiment is simple, occupies small size, can be well arranged in the motor driver, and a user does not need to build a complex external circuit by himself or herself when using the band-type brake control circuit, and can directly connect the band-type brake device with the band-type brake interface of the band-type brake control circuit in the motor driver.
In some embodiments, a field effect transistor may be used as the control of the switching unit, wherein a control terminal of the field effect transistor is connected to the control unit, i.e., receives a control signal of the control unit, an input terminal thereof is connected to the second terminal of the band-type brake interface, and an output terminal thereof is grounded. The input end and the output end of the field effect transistor can be controlled by a control signal received by the control end to realize on or off, when the field effect transistor is switched on, the current of the power supply can flow through the first end of the band-type brake interface and the second end of the band-type brake interface, the band-type brake device is supplied with power to be released, and the motor is not locked and can move; on the contrary, when the field effect transistor is turned off, no current passes between the first end of the band-type brake interface and the second end of the band-type brake interface, and the motor is locked.
As a specific example, as shown in fig. 2, the fet q1 includes an N-channel enhancement mode fet, a gate of which is connected to the control unit 15 as a control terminal, a drain of which is connected to the second terminal 12 of the band-type brake interface as an input terminal, a source of which is connected to the output terminal, and a source of which is grounded. Further, in some examples, a first resistor r1 is connected between the gate and the source of the fet q1, that is, two ends of the first resistor r1 are connected to the gate and the source, respectively, and the fet q1 is protected by disposing the first resistor r1 between the gate and the source, so as to prevent malfunction and even damage of the fet q1 caused by unreleased charges stored in the gate after shutdown. It should be noted that in other embodiments, other types of fet q1 may be used to achieve the same function, such as P-channel fet q1 or depletion fet q 1. Based on understanding the present embodiment, the skilled person can use different types of fets q1 as required, and only need to make corresponding adjustments to the circuit according to the characteristics of each type of fet q 1.
In some embodiments, the control unit receives a control signal and includes an isolation circuit through which the control signal controls the switching unit. The isolation circuit can isolate the control signal from interference sources such as a system power supply and the like, and mutual interference is avoided. In some embodiments, the isolation circuit is an optical coupling isolation circuit, and in other embodiments, other modes such as an electromagnetic isolation circuit, a digital isolation circuit, and the like may also be selected for signal isolation. In a specific implementation, the control Signal received by the control unit may be from a controller in the servo driver, and the controller may include, but is not limited to, an FPGA (Field Programmable Gate Array), a CPLD (Complex Programmable logic device), and a DSP (Digital Signal processing) controller.
As a specific example, the voltage stabilizing current spreading circuit includes an NPN type transistor having a base connected to the power supply through a second resistor, a collector directly connected to the power supply, an emitter connected to the control unit through a third resistor and connected to the switching unit through the control unit, and a voltage stabilizing diode. The cathode of the voltage stabilizing diode is connected with the base electrode of the triode, and the anode of the voltage stabilizing diode is grounded, namely the voltage stabilizing diode is arranged between the base electrode of the triode and the ground, so that the stability of the base electrode voltage of the triode can be ensured. However, it should be understood that, in practical applications, other types of regulated current-spreading circuits may also be used, and the transistor is not limited to the NPN transistor in this example, and in some embodiments, the PNP transistor may be replaced by the PNP transistor accordingly and achieve the same function.
In some embodiments, the internal contracting brake control circuit further comprises a protection diode, and the protection diode is arranged in a reverse direction and used for preventing the positive electrode and the negative electrode of the power supply from being reversely connected, so that the circuit damage caused by the reverse connection is avoided. In one example, the cathode of the protection diode is grounded, and the grounding ends of the components needing grounding in the band-type brake control circuit are connected with the anode of the protection diode together and grounded through the protection diode; or in another example, the anode of the protection diode is directly connected with the power supply, and all components in the band-type brake control circuit are connected with the cathode of the protection diode together and are connected with the power supply through the protection diode; that is, if a protection diode having an anode directly connected to the power supply is provided on the power supply side in the band-type brake control circuit, one end of each component originally directly connected to the power supply is connected to the cathode of the protection diode instead.
The embodiment also provides a driver circuit, which includes the band-type brake control circuit and a braking energy release circuit connected to the bus of the motor driver, where the braking energy release circuit is used to consume energy generated by the motor during braking. It can be understood that, when the band-type brake control circuit controls the band-type brake device to lock the motor, the energy generated by the braking of the motor will be fed back to the dc bus of the motor driver through the inverter loop of the motor driver, and the braking energy discharge circuit consumes the energy to protect the motor driver. In some embodiments, the band-type brake control circuit is powered by a separate band-type brake power supply (external or internal), and the braking energy release circuit ensures that the voltage on the bus is stable. In other embodiments, for example, as shown in fig. 3, the braking energy release circuit is connected to a bus of the motor driver, the band-type brake control circuit may also be connected to the bus, and the bus of the motor driver may be used to supply power to the band-type brake control circuit, when the motor is decelerated and braked or is forced to be pushed, the generated energy is fed back to the bus in the form of voltage, and the braking energy release circuit limits the voltage of the bus to prevent the voltage of the bus from being too high, thereby ensuring the safety and stability of the circuit of the band-type brake control circuit that supplies power through the bus. Fig. 3 also shows an example of a braking energy leakage circuit, where a plurality of leakage units are arranged at two ends of a bus capacitor 21, and each leakage unit is connected in parallel with the bus capacitor 21, and includes a transient diode 22 and a resistor 23 connected in series with an anode of the transient diode, when a voltage on the bus is too high, the transient diode 22 is broken down and conducted, and a part of electric energy is consumed by the resistor 23, so that energy generated by braking of the motor is effectively consumed, and the voltage on the bus is ensured to be stable; and the units such as a switching power supply, an inverter circuit and the like are connected with the discharge units in parallel. However, it is understood that, in the specific implementation process, the braking energy discharging circuit may also have other forms of implementation, and in practical applications, the driver circuit may further include other circuit units.
The present embodiment also provides a motor driver, as shown in fig. 4, the motor driver 100 includes the band-type brake control circuit 10. This motor driver 100 sets up band-type brake control circuit 10 inside, when the user uses, only need with band-type brake device with motor driver 100 built-in band-type brake control circuit 10 the band-type brake interface be connected can, in the concrete implementation process, motor driver 100 can also set up corresponding opening or switching port in order to make things convenient for the user to carry out the connection of band-type brake device and band-type brake interface. In some examples, as shown in fig. 5, the motor drive 100 is also provided with a power interface that enables a user to conveniently connect directly to an external brake power supply that is connected to the brake control circuit 10 to power the brake device. In some examples, a corresponding power supply may be provided inside the motor driver 100 to directly supply power to the band-type brake device.
The motor driver 100 of the embodiment is provided with the internal contracting brake control circuit 10, so that a user does not need to manually build an external control unit, the contracting brake device is convenient for the user to deploy, and the stability and reliability of the system are ensured. It will be appreciated that motor driver 100 may also use the driver circuit described above in a particular implementation. The present embodiment further provides a motor control system, which can be seen from fig. 4 and fig. 5, including the motor driver 100 and a band-type brake motor 200 connected to the motor driver 100, where the band-type brake motor 200 includes a band-type brake device, and the band-type brake device can lock a motor shaft of the band-type brake motor 200 after power failure to prevent the motor shaft from continuing to operate. The band-type brake device is connected with a band-type brake interface of the band-type brake control circuit 10 and is controlled by the band-type brake control circuit 10. The motor control system is simple and convenient to deploy, and stable and reliable motor band-type brake control can be achieved.
As a specific example, the band-type brake control circuit of the present invention is specifically described below with a specific circuit implementation, please refer to fig. 6, which shows a specific circuit diagram of the band-type brake control circuit.
Seen from the whole structure, the contracting brake control circuit comprises a contracting brake interface, a switch unit, a voltage stabilizing and current expanding circuit and a control unit. In this example, the switch unit mainly includes a field effect transistor q1, which is specifically an N-channel enhancement type field effect transistor in this example, the voltage-stabilizing current-spreading circuit is a series-connection type triode q2 voltage-stabilizing current-spreading circuit, and the control unit receives a control signal through the optical coupling isolation circuit.
As an example, a connection mode of each of the partial components will be described in detail below. As shown in fig. 6, the band-type brake interface comprises a first terminal 11 and a second terminal 12, wherein the first terminal 11 is directly connected with a power supply, and the second terminal 12 is connected with the drain electrode of the fet q 1.
The voltage-stabilizing current-amplifying circuit comprises a voltage-stabilizing diode d1, a triode q2, a second resistor r2 and a third resistor r3, wherein the triode q2 is an NPN type triode, the collector of the triode q2 is directly connected with a power supply, and the base of the triode q2 is connected with the power supply through the second resistor r 2; the anode of the zener diode d1 is grounded, the cathode is connected between the base of the triode q2 and the second resistor r2, and the zener diode d1 ensures the voltage stability of the base of the triode q 2. An emitter of the triode q2 serves as an output end, and the emitter is connected to the optical coupling isolation circuit through a third resistor r3 and is connected with the grid of the field-effect transistor q1 through the optical coupling isolation circuit. After the optical coupling isolation circuit receives an effective control signal, the optical coupling unit u1 is conducted, so that the emitter of the triode q2 and the grid of the field effect transistor q1 are conducted.
The source of the fet q1 is grounded, and in this example, a protection diode d2 is provided on the ground side, and the zener diode d1 and the fet q1 are connected to the anode of the protection diode d2 and grounded via the protection diode d 2. The switch unit further includes a first resistor r1, one end of which is connected to the gate of the fet q1 and the other end of which is connected to the source, for protecting the fet q 1.
It should be understood that the parameter values of the various components in the band-type brake control circuit in the embodiment are selected according to the actual application, and are not limited herein.
When the band-type brake control circuit is used, the band-type brake interface is connected with the band-type brake device, namely, a band-type brake coil in the band-type brake device is switched on. The base of the triode q2 is stabilized to a certain voltage value under the action of the voltage stabilizing diode d1, when the optical coupling isolation circuit does not receive an effective control signal, the optical coupling unit u1 is not conducted, the grid of the field-effect transistor q1 is not input with voltage, the field-effect transistor q1 is also not conducted, therefore, the band-type brake coil is not supplied with power, and the band-type brake device tightly holds the motor shaft of the motor.
When the optical coupling isolation circuit receives an effective control signal, the optical coupling unit u1 is conducted, the field-effect transistor q1 also meets the conduction condition, and works and is in an unsaturated state, and voltage is applied to the grid electrode of the field-effect transistor q1 after passing through a collector and an emitter of the triode q2 and the third resistor r 3. In this example, the control signal is provided by the DSP controller c, and the optical coupling unit u1 receives the control signal through the fourth resistor r 4. It should be noted that the gate voltage of the fet q1 is slightly lower than the base voltage of the transistor q2 in the regulated current spreading circuit, and it is understood that the gate voltage does not exceed the maximum withstand voltage of the gate of the fet q1, and the fet q1 is turned on. When the field effect transistor q1 is switched on, a part of current of the power supply sequentially flows through the first end 11 of the contracting brake interface, the second end 12 of the contracting brake interface and the field effect transistor q1, finally enters the ground wire through the protection diode d2, the power supply supplies power to the contracting brake coil, the contracting brake device is loosened, and the motor can move. It is to be understood that the specific circuits described above are merely examples, and that other specific implementations of the circuits are possible.
The foregoing is a more detailed description of embodiments of the present invention, and the specific embodiments are not to be considered in a limiting sense. To the utility model belongs to the technical field of ordinary technical personnel, do not deviate from the utility model discloses under the prerequisite of design, can also make a plurality of simple deductions or replacement, all should regard as belonging to the utility model discloses a protection scope.
Claims (10)
1. A band-type brake control circuit is characterized by comprising a band-type brake interface, wherein a first end (11) of the band-type brake interface is connected with a power supply, a second end (12) of the band-type brake interface is connected with the ground through a switch unit (13), and when the switch unit (13) is conducted, the second end (12) is grounded; the switch unit (13) is connected with a control unit (15), and the control unit (15) controls the switch unit (13) to be switched on or off; the power supply is also connected with a voltage-stabilizing current-expanding circuit (14), the voltage-stabilizing current-expanding circuit (14) is connected with the switch unit (13) through the control unit (15), and when the control unit (15) receives a corresponding control signal, the voltage-stabilizing current-expanding circuit (14) provides current to drive the switch unit (13) to be conducted; the contracting brake device is connected with the contracting brake interface, and when the switch unit (13) is switched on, the contracting brake device is released.
2. The band-type brake control circuit according to claim 1, characterized in that the switch unit (13) comprises a field effect transistor (q1), a control terminal of the field effect transistor (q1) is connected with the control unit (15), an input terminal of the field effect transistor is connected with the second terminal (12) of the band-type brake interface, and an output terminal of the field effect transistor (q1) is grounded.
3. The band-type brake control circuit according to claim 2, wherein the fet (q1) comprises an N-channel enhancement mode fet; the grid electrode of the N-channel enhanced field effect transistor is the control end and is connected with the control unit (15); the drain electrode of the N-channel enhanced field effect transistor is the input end and is connected with the second end (12) of the band-type brake interface; and the source electrode of the N-channel enhanced field effect transistor is the output end, and the source electrode is grounded.
4. The band-type brake control circuit according to claim 3, characterized in that the switch unit (13) further comprises a first resistor (r1) having one end connected to the gate of the FET (q1) and the other end connected to the source of the FET (q 1).
5. The band-type brake control circuit according to claim 1, wherein the control unit (15) comprises an isolation circuit, and the control signal controls the switch unit (13) to be switched on or off through the isolation circuit.
6. A band-type brake control circuit according to claim 1, wherein the voltage-stabilizing current-spreading circuit (14) comprises a transistor (q2), the transistor (q2) is an NPN-type transistor, the base thereof is connected to the power supply through a second resistor (r2), the collector thereof is directly connected to the power supply, the emitter thereof is connected to the control unit (15) through a third resistor (r3), and the switching unit (13) is connected through the control unit (15); and a zener diode (d1) having a cathode connected between the base of the transistor (q2) and the second resistor (r2) and an anode connected to ground.
7. The band-type brake control circuit according to claim 1, further comprising a protection diode (d2), wherein the cathode of the protection diode (d2) is grounded, the grounded ends of the grounded components in the band-type brake control circuit are commonly connected with the anode of the protection diode (d2) and grounded through the protection diode (d2),
or the like, or, alternatively,
the anode of the protection diode (d2) is directly connected with the power supply, and all components connected with the power supply in the band-type brake control circuit are connected with the cathode of the protection diode (d2) together, and are connected with the power supply through the protection diode (d 2).
8. A driver circuit, characterized in that the driver circuit comprises a band-type brake control circuit (10) according to any one of claims 1-7, and a braking energy discharging circuit connected with a bus of the motor driver, and the braking energy discharging circuit is used for consuming energy generated when the motor brakes.
9. A motor drive, characterized in that the motor drive (100) comprises a band-type brake control circuit (10) according to any one of claims 1-7.
10. A motor control system, characterized by comprising the motor driver (100) of claim 9 and a band-type motor (200) connected with the motor driver (100), wherein the band-type motor (200) comprises a band-type brake device, and the band-type brake device is connected with the band-type brake interface of the band-type brake control circuit (10) and is controlled by the band-type brake control circuit (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021965963.2U CN213342055U (en) | 2020-09-09 | 2020-09-09 | Band-type brake control circuit, driver circuit, motor driver and motor control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021965963.2U CN213342055U (en) | 2020-09-09 | 2020-09-09 | Band-type brake control circuit, driver circuit, motor driver and motor control system |
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| Publication Number | Publication Date |
|---|---|
| CN213342055U true CN213342055U (en) | 2021-06-01 |
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| CN202021965963.2U Active CN213342055U (en) | 2020-09-09 | 2020-09-09 | Band-type brake control circuit, driver circuit, motor driver and motor control system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116707354A (en) * | 2023-07-28 | 2023-09-05 | 深圳众城卓越科技有限公司 | Band-type brake control circuit of multi-drive variable pitch system and band-type brake control method thereof |
-
2020
- 2020-09-09 CN CN202021965963.2U patent/CN213342055U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116707354A (en) * | 2023-07-28 | 2023-09-05 | 深圳众城卓越科技有限公司 | Band-type brake control circuit of multi-drive variable pitch system and band-type brake control method thereof |
| CN116707354B (en) * | 2023-07-28 | 2023-12-22 | 深圳众城卓越科技有限公司 | Band-type brake control circuit of multi-drive variable pitch system and band-type brake control method thereof |
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