CN219535925U - Power supply device of motor and motor driver - Google Patents
Power supply device of motor and motor driver Download PDFInfo
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- CN219535925U CN219535925U CN202320150983.1U CN202320150983U CN219535925U CN 219535925 U CN219535925 U CN 219535925U CN 202320150983 U CN202320150983 U CN 202320150983U CN 219535925 U CN219535925 U CN 219535925U
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Abstract
The utility model discloses a power supply device and a motor driver of a motor, wherein the power supply device of the motor comprises a soft starter and a bypass controller, the soft starter is used for outputting a starting signal based on an alternating current power supply signal so as to carry out soft start on the motor, and the bypass controller is used for outputting the bypass signal and stopping outputting the starting signal after the soft start is finished; the bypass controller is used for outputting a driving signal when receiving the bypass signal so as to drive the motor to operate; the soft starter only participates in the operation in the starting process of the motor, and after the starting is finished, the soft starter is withdrawn from operation, and the bypass controller replaces the soft starter to continuously output an alternating current power supply signal to drive the motor to operate, so that the shutdown fault of equipment caused by the performance change of electronic components in the soft starter can be reduced, the safe and stable operation of key equipment is ensured, the service life of the soft starter is prolonged, and the reliability of motor driving control is further improved; while reducing equipment maintenance costs and power consumption.
Description
Technical Field
The present utility model relates to the technical field of motor power supply control, and in particular, to a power supply device and a motor driver for a motor.
Background
At present, a low-voltage motor with larger power is mainly started and controlled by soft start, but with the prolongation of the service cycle of the soft starter, fault-free alarm shutdown of the soft starter is easy to occur, serious influence is caused on normal production of a production line for installing the motor, when the fault-free alarm shutdown problem occurs to the soft starter, preventive measures are not provided temporarily, spare parts of the soft starter are replaced after faults occur, the service life of the soft starter is lower, and the control reliability in the motor operation process is insufficient.
Therefore, how to improve the reliability of motor driving control is a technical problem to be solved at present.
Disclosure of Invention
The power supply device and the motor driver of the motor improve the reliability of motor driving control.
The embodiment of the utility model provides the following scheme:
in a first aspect, an embodiment of the present utility model provides a power supply apparatus for a motor, including: a soft starter and bypass controller;
the soft starter comprises an input end for inputting an alternating current power supply signal, a first output end for outputting a starting signal, and a second output end for outputting a bypass signal; the first output end of the soft starter is connected with the power end of the motor; the soft starter is used for outputting the starting signal based on the alternating current power supply signal so as to carry out soft start on the motor, outputting the bypass signal after the soft start is completed and stopping outputting the starting signal;
the bypass controller comprises an input end for inputting the alternating current power supply signal, an output end for outputting a driving signal and a control end for receiving the bypass signal; the output end of the bypass controller is connected with the power end of the motor, and the control end of the bypass controller is connected with the second output end of the soft starter; the bypass controller is used for outputting the driving signal when receiving the bypass signal so as to drive the motor to run.
In an alternative embodiment, the bypass controller includes:
the controller comprises a control end for receiving the bypass signal and an output end for outputting a control signal;
the contactor comprises an input end for inputting the alternating current power supply signal, an output end for outputting the driving signal and a control end for receiving the control signal, and the control end of the contactor is connected with the control end of the controller.
In an alternative embodiment, the controller is a host computer or a PLC controller.
In an alternative embodiment, the bypass controller further comprises:
the motor protector comprises an input end and an output end, wherein the input end is used for inputting an original driving signal, the input end of the motor protector is connected with the output end of the contactor, and the output end of the motor protector is connected with the power end of the motor.
In an alternative embodiment, the bypass control is an overload relay.
In a second aspect, an embodiment of the present utility model further provides a motor driver, including a power supply device of any one of the motors in the first aspect, where the power supply device includes: a soft starter and bypass controller;
the soft starter comprises an input end for inputting an alternating current power supply signal, a first output end for outputting a starting signal, and a second output end for outputting a bypass signal; the first output end of the soft starter is connected with the power end of the motor; the soft starter is used for outputting the starting signal based on the alternating current power supply signal so as to carry out soft start on the motor, outputting the bypass signal after the soft start is completed and stopping outputting the starting signal;
the bypass controller comprises an input end for inputting the alternating current power supply signal, an output end for outputting a driving signal and a control end for receiving the bypass signal; the output end of the bypass controller is connected with the power end of the motor, and the control end of the bypass controller is connected with the second output end of the soft starter; the bypass controller is used for outputting the driving signal when receiving the bypass signal so as to drive the motor to run.
In an alternative embodiment, the bypass controller includes:
the controller comprises a control end for receiving the bypass signal and an output end for outputting a control signal;
the contactor comprises an input end for inputting the alternating current power supply signal, an output end for outputting the driving signal and a control end for receiving the control signal, and the control end of the contactor is connected with the control end of the controller.
In an alternative embodiment, the controller is a host computer or a PLC controller.
In an alternative embodiment, the bypass controller further comprises:
the motor protector comprises an input end and an output end, wherein the input end is used for inputting an original driving signal, the input end of the motor protector is connected with the output end of the contactor, and the output end of the motor protector is connected with the power end of the motor.
In an alternative embodiment, the bypass control is an overload relay.
Compared with the prior art, the power supply device and the motor driver of the motor have the following advantages:
the motor power supply device comprises a soft starter and a bypass controller, wherein the soft starter comprises an input end for inputting an alternating current power supply signal, a first output end for outputting a starting signal and a second output end for outputting a bypass signal; the first output end of the soft starter is connected with the power end of the motor; the soft starter is used for outputting a starting signal based on the alternating current power supply signal so as to carry out soft start on the motor, outputting a bypass signal after the soft start is finished, and stopping outputting the starting signal; the bypass controller comprises an input end for inputting an alternating current power supply signal, an output end for outputting a driving signal and a control end for receiving a bypass signal; the output end of the bypass controller is connected with the power end of the motor, and the control end of the bypass controller is connected with the second output end of the soft starter; the bypass controller is used for outputting a driving signal when receiving the bypass signal so as to drive the motor to operate; the soft starter only participates in the operation in the starting process of the motor, and after the starting is finished, the soft starter is withdrawn from operation, and the bypass controller replaces the soft starter to continuously output an alternating current power supply signal to drive the motor to operate, so that the shutdown fault of equipment caused by the performance change of electronic components in the soft starter can be reduced, the safe and stable operation of key equipment is ensured, the service life of the soft starter is prolonged, and the reliability of motor driving control is further improved; while reducing equipment maintenance costs and power consumption.
Drawings
In order to more clearly illustrate the embodiments of the present description or the technical solutions in the prior art, the drawings that are required for the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present description, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a power supply device of a motor according to an embodiment of the present utility model;
FIG. 2 is a schematic diagram of an embodiment of the present utility model;
fig. 3 is a second electrical schematic diagram according to an embodiment of the present utility model.
Reference numerals illustrate: 1-soft starter, 2-bypass controller, 3-motor, 21-contactor, 22-motor protector.
Detailed Description
The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are only some embodiments of the present utility model, but not all embodiments, and all other embodiments obtained by those skilled in the art based on the embodiments of the present utility model are within the scope of protection of the embodiments of the present utility model.
Referring to fig. 1, an embodiment of the present utility model provides a power supply device for a motor, including: a soft starter and bypass controller;
the soft starter (or SMC) comprises an input end for inputting an alternating current power supply signal, a first output end for outputting a starting signal, and a second output end for outputting a bypass signal; the first output end of the soft starter is connected with the power end of the motor; the soft starter is used for outputting a starting signal based on the alternating current power supply signal so as to carry out soft start on the motor, outputting a bypass signal after the soft start is finished, and stopping outputting the starting signal; the bypass controller comprises an input end for inputting an alternating current power supply signal, an output end for outputting a driving signal and a control end for receiving a bypass signal; the output end of the bypass controller is connected with the power end of the motor, and the control end of the bypass controller is connected with the second output end of the soft starter; the bypass controller is used for outputting a driving signal when receiving the bypass signal so as to drive the motor to operate.
Specifically, the model of the soft starter can be determined according to the specification of the motor, for example, when the motor is a three-phase alternating current motor, the soft starter matched with the motor can be selected, and the motor can be subjected to soft start. It can be understood that the soft starter adopts a three-phase anti-parallel thyristor as a voltage regulator, and is connected between a power supply and a motor stator, and the circuit is, for example, a three-phase full-control bridge rectifier circuit. After the soft starter finishes soft start of the motor, the soft starter can be automatically switched to a built-in bypass contactor to supply power so as to replace a power supply circuit of a thyristor for finishing a starting task. In the long-term use process, the electric elements inside the soft starter are gradually lost, for example, the contacts of the built-in bypass contactor are oxidized, so that the service life of the soft starter is lower, and the reliability of the power supply control of the motor is affected.
In order to improve the reliability of power supply control of the motor, the power supply device is provided with a bypass controller, and the bypass controller is connected with the soft starter in parallel to supply power to the motor. The soft starter can respond to the starting command of an operator to implement soft start on the motor, stop working after the soft start is completed and output a bypass signal. The bypass signal can be output through a control board of the soft starter or can be output based on a normally open end of a built-in bypass contactor, for example, a low-voltage level signal of 5V or 12V is output. And after the control end of the bypass controller receives the bypass signal, outputting a driving signal based on the alternating current power supply signal to supply power to the motor. The bypass controller can be a control board integrated with an optocoupler, a singlechip and an intermediate relay, wherein the input end of the optocoupler receives a bypass signal and outputs a trigger signal to the singlechip after receiving the bypass signal, the singlechip sends out a control signal to the intermediate relay, the intermediate relay is attracted, and the two ends of the normal open end of the intermediate relay are connected with an alternating current power supply and a motor so as to output a driving signal to the motor; the contactor can also be a contactor, wherein two ends of the common end of the contactor are configured as an input end and an output end of the bypass controller, and the control end of the contactor is configured as the control end of the bypass controller. When the bypass signal is received, the contactor is attracted and conducted to drive the motor to operate. The built-in bypass contactor of the soft starter is in a low-voltage working state, so that the soft starter has a longer service life.
In practical application, the bypass signal may be a jump edge signal or a high level signal, and if the bypass controller is set to be a contactor, the jump edge signal cannot be applied. Based on this, in one specific embodiment, the bypass controller includes:
the controller comprises a control end for receiving the bypass signal and an output end for outputting the control signal; the contactor comprises an input end for inputting an alternating current power supply signal, an output end for outputting a driving signal and a control end for receiving a control signal, and the control end of the contactor is connected with the control end of the controller.
Specifically, the controller may be a PLC controller (Programmable logic Controller ), or may be a PC (personal computer, personal computer) or an upper computer formed by an industrial personal computer. After receiving the bypass signal, the control end of the controller outputs a control signal to the input end of the contactor, and the contactor is sucked and conducted to output a driving signal to the motor for operation.
Referring to fig. 2-3, an air switch QL and a safety FU are installed on a circuit of a first input end of the soft starter, a contactor KM and the soft starter are parallel, the soft starter participates in the starting process, the soft starter exits from running after the starting is completed, and two operation modes of manual triggering and automatic triggering beside the machine can be realized through a selector switch SA and a PLC controller. After the motor is started manually, the selection switch SA is arranged at a preset position, after the soft starter is started, a bypass signal is sent, the external contactor is attracted, the motor operates normally, and meanwhile, the normally open point of the external contactor connected in series with the soft starter is closed, so that the soft starter stops automatically after the motor operates normally. The machine is stopped manually, a stop button SS1 beside the machine box is directly pressed, the contactor KM is powered off, and the motor stops running. The PLC controller is started, the selector switch SA is arranged at the middle position, the PLC controller is electrified and started, after the soft starter is started, the bypass signal is sent out, the external contactor is attracted, the motor is normally operated, and the soft starter automatically stops after the motor is normally operated. And when the PLC controller sends a stop command, the normally closed point of the intermediate relay KA is disconnected, the contactor KM is powered off, and the motor is stopped. In addition, a thermal relay KH can be arranged at the output end of the contactor to perform overheat protection; the automatic monitoring device can also be connected with automatic equipment (Distribution Substation Automation, DSA) of the power distribution station to realize automatic monitoring in the starting process of the motor; of course, the circuit may be further connected to a first indicator light HG1, a second indicator light HG2, a third indicator light HY1 and a fourth indicator light HY2, where the first indicator light HG1 is used for indicating the working state of the contactor KM, the second indicator light HG2 is used for indicating the working state of the soft starter, and the third indicator light HY1 and the fourth indicator light HY2 indicate the power supply state of the soft starter.
It should be further noted that the contactor may be a permanent magnet contactor or an electromagnetic contactor. Preferably, the contactor is a permanent magnetic contactor, and referring to table 1, through long-term use verification of the permanent magnetic contactor, the energy-saving effect is remarkable, and the annual energy-saving quantity is larger than that of the electromagnetic contactor. Meanwhile, the permanent magnet contactor is also suitable for processing the voltage 'power-on interference' of an alternating-current power supply, the voltage of a common contactor is reduced to below 75% of a rated value, the contactor is tripped, and the value of the voltage released by the permanent magnet contactor is about 40% of the rated value.
Table 1:
in practical application, the contactor only plays a role of on-off, so that if the motor or the alternating current power supply is abnormal, the motor can not be timely alarmed, and the reliability of motor control still has a defect. Based on this, in a specific embodiment, the bypass controller further includes:
the motor protector comprises an input end and an output end, wherein the input end is used for inputting an original driving signal, the input end of the motor protector is connected with the output end of the contactor, and the output end of the motor protector is connected with the power end of the motor.
Specifically, the specific model of the motor protector can be determined according to the motor, the motor protector has the function of comprehensively protecting and controlling the motor, and alarming or protecting and controlling are sent out when the motor has faults such as overcurrent, undercurrent, phase failure, locked rotor, short circuit, overvoltage, undervoltage, electric leakage, three-phase imbalance, overheat, grounding, bearing abrasion, stator and rotor eccentricity and the like.
It should be noted that, the bypass controller may also be an overload relay, and is installed in parallel with the soft starter, after the soft starter completes soft start of the motor, the overload relay is attracted based on the bypass signal, the overload relay may perform trip protection and alarm, and alarm information is sent out when faults such as overload, underload, current imbalance, etc. occur.
Based on the same inventive concept as the power supply device, the embodiment of the utility model also provides a motor driver, which comprises any one of the motor power supply devices, wherein the power supply device comprises: a soft starter and bypass controller;
the soft starter comprises an input end for inputting an alternating current power supply signal, a first output end for outputting a starting signal, and a second output end for outputting a bypass signal; the first output end of the soft starter is connected with the power end of the motor; the soft starter is used for outputting a starting signal based on the alternating current power supply signal so as to carry out soft start on the motor, outputting a bypass signal after the soft start is finished, and stopping outputting the starting signal; the bypass controller comprises an input end for inputting an alternating current power supply signal, an output end for outputting a driving signal and a control end for receiving a bypass signal; the output end of the bypass controller is connected with the power end of the motor, and the control end of the bypass controller is connected with the second output end of the soft starter; the bypass controller is used for outputting a driving signal when receiving the bypass signal so as to drive the motor to operate.
Specifically, the motor driver may integrate other control circuits according to the usage scenario of the motor, for example, integrate a drive control board, where the drive control board is connected in series to the input end or the output end of the bypass controller to perform speed regulation control on the motor.
In an alternative embodiment, the bypass controller includes:
the controller comprises a control end for receiving the bypass signal and an output end for outputting the control signal;
the contactor comprises an input end for inputting an alternating current power supply signal, an output end for outputting a driving signal and a control end for receiving a control signal, and the control end of the contactor is connected with the control end of the controller.
In an alternative embodiment, the controller is a host computer or a PLC controller.
In an alternative embodiment, the bypass controller further comprises:
the motor protector comprises an input end and an output end, wherein the input end is used for inputting an original driving signal, the input end of the motor protector is connected with the output end of the contactor, and the output end of the motor protector is connected with the power end of the motor.
In an alternative embodiment, the bypass control is an overload relay.
The technical scheme provided by the embodiment of the utility model has at least the following technical effects or advantages:
the motor power supply device comprises a soft starter and a bypass controller, wherein the soft starter comprises an input end for inputting an alternating current power supply signal, a first output end for outputting a starting signal and a second output end for outputting a bypass signal; the first output end of the soft starter is connected with the power end of the motor; the soft starter is used for outputting a starting signal based on the alternating current power supply signal so as to carry out soft start on the motor, outputting a bypass signal after the soft start is finished, and stopping outputting the starting signal; the bypass controller comprises an input end for inputting an alternating current power supply signal, an output end for outputting a driving signal and a control end for receiving a bypass signal; the output end of the bypass controller is connected with the power end of the motor, and the control end of the bypass controller is connected with the second output end of the soft starter; the bypass controller is used for outputting a driving signal when receiving the bypass signal so as to drive the motor to operate; the soft starter only participates in the operation in the starting process of the motor, and after the starting is finished, the soft starter is withdrawn from operation, and the bypass controller replaces the soft starter to continuously output an alternating current power supply signal to drive the motor to operate, so that the shutdown fault of equipment caused by the performance change of electronic components in the soft starter can be reduced, the safe and stable operation of key equipment is ensured, the service life of the soft starter is prolonged, and the reliability of motor driving control is further improved; while reducing equipment maintenance costs and power consumption.
While preferred embodiments of the present utility model have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiments and all such alterations and modifications as fall within the scope of the utility model.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present utility model without departing from the spirit or scope of the utility model. Thus, it is intended that the present utility model also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (10)
1. A power supply device for an electric motor, comprising: a soft starter and bypass controller;
the soft starter comprises an input end for inputting an alternating current power supply signal, a first output end for outputting a starting signal, and a second output end for outputting a bypass signal; the first output end of the soft starter is connected with the power end of the motor; the soft starter is used for outputting the starting signal based on the alternating current power supply signal so as to carry out soft start on the motor, outputting the bypass signal after the soft start is completed and stopping outputting the starting signal;
the bypass controller comprises an input end for inputting the alternating current power supply signal, an output end for outputting a driving signal and a control end for receiving the bypass signal; the output end of the bypass controller is connected with the power end of the motor, and the control end of the bypass controller is connected with the second output end of the soft starter; the bypass controller is used for outputting the driving signal when receiving the bypass signal so as to drive the motor to run.
2. The power supply apparatus of a motor according to claim 1, wherein the bypass controller includes:
the controller comprises a control end for receiving the bypass signal and an output end for outputting a control signal;
the contactor comprises an input end for inputting the alternating current power supply signal, an output end for outputting the driving signal and a control end for receiving the control signal, and the control end of the contactor is connected with the control end of the controller.
3. The power supply device of a motor according to claim 2, wherein the controller is an upper computer or a PLC controller.
4. The power supply apparatus of a motor according to claim 2, wherein the bypass controller further includes:
the motor protector comprises an input end and an output end, wherein the input end is used for inputting an original driving signal, the input end of the motor protector is connected with the output end of the contactor, and the output end of the motor protector is connected with the power end of the motor.
5. The power supply of an electric machine according to claim 1, wherein the bypass controller is an overload relay.
6. A motor drive comprising the power supply device of the motor of any one of claims 1-5, the power supply device comprising: a soft starter and bypass controller;
the soft starter comprises an input end for inputting an alternating current power supply signal, a first output end for outputting a starting signal, and a second output end for outputting a bypass signal; the first output end of the soft starter is connected with the power end of the motor; the soft starter is used for outputting the starting signal based on the alternating current power supply signal so as to carry out soft start on the motor, outputting the bypass signal after the soft start is completed and stopping outputting the starting signal;
the bypass controller comprises an input end for inputting the alternating current power supply signal, an output end for outputting a driving signal and a control end for receiving the bypass signal; the output end of the bypass controller is connected with the power end of the motor, and the control end of the bypass controller is connected with the second output end of the soft starter; the bypass controller is used for outputting the driving signal when receiving the bypass signal so as to drive the motor to run.
7. The motor driver of claim 6, wherein the bypass controller includes:
the controller comprises a control end for receiving the bypass signal and an output end for outputting a control signal;
the contactor comprises an input end for inputting the alternating current power supply signal, an output end for outputting the driving signal and a control end for receiving the control signal, and the control end of the contactor is connected with the control end of the controller.
8. The motor driver of claim 7, wherein the controller is a host computer or a PLC controller.
9. The motor drive of claim 7, wherein the bypass controller further comprises:
the motor protector comprises an input end and an output end, wherein the input end is used for inputting an original driving signal, the input end of the motor protector is connected with the output end of the contactor, and the output end of the motor protector is connected with the power end of the motor.
10. The motor driver of claim 6 wherein the bypass controller is an overload relay.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320150983.1U CN219535925U (en) | 2023-02-06 | 2023-02-06 | Power supply device of motor and motor driver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320150983.1U CN219535925U (en) | 2023-02-06 | 2023-02-06 | Power supply device of motor and motor driver |
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| CN219535925U true CN219535925U (en) | 2023-08-15 |
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| CN202320150983.1U Active CN219535925U (en) | 2023-02-06 | 2023-02-06 | Power supply device of motor and motor driver |
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| CN (1) | CN219535925U (en) |
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2023
- 2023-02-06 CN CN202320150983.1U patent/CN219535925U/en active Active
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