CN112054719A - Permanent magnet motor phase-locked circuit and permanent magnet motor - Google Patents
Permanent magnet motor phase-locked circuit and permanent magnet motor Download PDFInfo
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- CN112054719A CN112054719A CN202011032180.3A CN202011032180A CN112054719A CN 112054719 A CN112054719 A CN 112054719A CN 202011032180 A CN202011032180 A CN 202011032180A CN 112054719 A CN112054719 A CN 112054719A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P3/00—Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters
- H02P3/06—Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters for stopping or slowing an individual dynamo-electric motor or dynamo-electric converter
- H02P3/18—Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters for stopping or slowing an individual dynamo-electric motor or dynamo-electric converter for stopping or slowing an ac motor
- H02P3/22—Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters for stopping or slowing an individual dynamo-electric motor or dynamo-electric converter for stopping or slowing an ac motor by short-circuit or resistive braking
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Abstract
The invention provides a permanent magnet motor phase-locked circuit and a permanent magnet motor, wherein the permanent magnet motor phase-locked circuit comprises a rectifying circuit connected with the permanent magnet motor and a rectifying control circuit connected with the rectifying circuit; the rectifying circuit receives alternating current generated when the permanent magnet motor moves after power failure and converts the alternating current into direct current; the rectification control circuit is used for controlling the short circuit of the positive electrode and the negative electrode of the rectification circuit to form a loop, so that the permanent magnet motor is locked in phase to generate damping force, and the movement of the permanent magnet motor after power failure is buffered. According to the phase-locked circuit of the permanent magnet motor, alternating current generated by movement of the permanent magnet motor after power failure is converted into direct current through the rectifying circuit, and the rectifying circuit is in short circuit through the rectifying circuit to form a loop, so that a coil of the permanent magnet motor generates damping force, the movement of the permanent magnet motor after power failure is buffered, and the movement of the permanent magnet motor after power failure is rapidly stopped.
Description
Technical Field
The invention relates to the field of permanent magnet motor control, in particular to a permanent magnet motor phase-locked circuit and a permanent magnet motor.
Background
In the existing permanent magnet motor driving circuit, when a power supply is disconnected or abnormal, a permanent magnet motor can also rotate rapidly due to inertia, and when other mechanical structures are loaded on the permanent magnet motor, the motion of the permanent magnet motor after power failure can bring adverse effects to other mechanical structures.
Disclosure of Invention
In view of the above problems, the present invention provides a phase-locked circuit for a permanent magnet motor and a permanent magnet motor, so as to buffer the movement of the permanent magnet motor after power failure and to rapidly stop the movement of the permanent magnet motor after power failure.
In order to achieve the purpose, the invention adopts the following technical scheme:
a permanent magnet motor phase locking circuit comprises a rectifying circuit connected with a permanent magnet motor and a rectifying control circuit connected with the rectifying circuit;
the rectifying circuit receives alternating current generated when the permanent magnet motor moves after power failure and converts the alternating current into direct current;
the rectification control circuit is used for controlling the short circuit of the positive electrode and the negative electrode of the rectification circuit to form a loop, so that the permanent magnet motor is locked in phase to generate damping force, and the movement of the permanent magnet motor after power failure is buffered.
Preferably, in the phase-locked circuit of the permanent magnet motor, the rectifying circuit includes a first diode, a second diode, a third diode, a fourth diode, a fifth diode and a sixth diode;
the anode of the first diode is connected with a first phase line of the permanent magnet motor;
the anode of the second diode is connected with a second phase line of the permanent magnet motor;
the anode of the third diode is connected with a third phase line of the permanent magnet motor;
the cathode of the fourth diode is connected with the first phase line of the permanent magnet motor;
the cathode of the fifth diode is connected with a second phase line of the permanent magnet motor;
the cathode of the sixth diode is connected with a third phase line of the permanent magnet motor;
cathodes of the first diode, the second diode and the third diode are connected in parallel to form an anode of the rectifying circuit;
the anodes of the fourth diode, the fifth diode and the sixth diode are connected in parallel to be the cathode of the rectifying circuit.
Preferably, in the phase-locked circuit of the permanent magnet motor, the rectifier circuit is an inverter rectifier circuit;
the inverter rectifying circuit is used for converting a direct current power supply into an alternating current power supply and driving the permanent magnet motor to work, receiving alternating current generated by the permanent magnet motor when the permanent magnet motor moves after power failure and converting the alternating current into direct current.
Preferably, in the permanent magnet motor phase-locked circuit, the inverter rectification circuit includes a first MOS transistor, a second MOS transistor, a third MOS transistor, a fourth MOS transistor, a fifth MOS transistor, and a sixth MOS transistor;
the source electrode of the first MOS tube is connected with a first phase line of the permanent magnet motor;
the source electrode of the second MOS tube is connected with a second phase line of the permanent magnet motor;
the source electrode of the third MOS tube is connected with a third phase line of the permanent magnet motor;
the drain of the fourth MOS transistor is connected with a first phase line of the permanent magnet motor;
the drain of the fifth MOS tube is connected with a second phase line of the permanent magnet motor;
the drain electrode of the sixth MOS tube is connected with a third phase line of the permanent magnet motor;
the drains of the first MOS tube, the second MOS tube and the third MOS tube are connected in parallel to form the anode of the rectifying circuit;
the source electrodes of the fourth MOS tube, the fifth MOS tube and the sixth MOS tube are connected in parallel to form a negative stage of the rectifying circuit.
Preferably, in the phase-locked circuit of the permanent magnet motor, the first MOS transistor, the second MOS transistor, the third MOS transistor, the fourth MOS transistor, the fifth MOS transistor, and the sixth MOS transistor are N-channel MOS transistors, and the alternating current is converted into the direct current through a parasitic diode of the N-channel MOS transistor.
Preferably, in the permanent magnet motor phase-locked circuit, the inverter rectification circuit further includes an inverter control chip, the inverter control chip is connected to the gates of the first MOS transistor, the second MOS transistor, the third MOS transistor, the fourth MOS transistor, the fifth MOS transistor, and the sixth MOS transistor, and controls the inverter circuit to convert a dc power supply into an ac power supply.
Preferably, in the phase-locked circuit of the permanent magnet motor, the rectification control circuit comprises a relay control circuit;
and the control output end of the relay control circuit is connected with the positive electrode and the negative electrode of the rectifying circuit and used for receiving a control signal and then enabling the control output end to be in short circuit with the positive electrode and the negative electrode of the rectifying circuit.
Preferably, in the phase-locked circuit of the permanent magnet motor, the relay control circuit includes a relay, a seventh diode, a triode, a first resistor, a second resistor, a first driving power supply and a control signal input pin;
a first coil pin of the relay is connected to the anode of the first driving power supply and the cathode of the seventh diode; the second coil pin is connected to the anode of the seven diode;
a pin at the public end of the relay is connected with the anode of the rectifying circuit, and a pin at the normally closed end is connected with the cathode of the rectifying circuit;
the base electrode of the triode is connected to the control signal input pin through the first resistor, the collector electrode of the triode is connected to the second coil pin of the relay, the emitter electrode of the triode is connected with the negative electrode of the first driving power supply, and the triode is an NPN type triode;
one end of the second resistor is connected to the base electrode of the triode, and the other end of the second resistor is connected to the emitting electrode of the triode;
and after the permanent magnet motor is powered off, the normally closed end of the relay is connected with the common end.
Preferably, in the phase-locked circuit for the permanent magnet motor, when the rectifier circuit is an inverter rectifier circuit, the positive electrode of the second driving power supply of the inverter rectifier circuit is connected to the normally open end pin of the relay, and the negative electrode of the second driving power supply of the inverter rectifier circuit is connected to the normally closed end pin of the relay.
The invention also provides a permanent magnet motor which comprises the permanent magnet motor phase-locking circuit.
The invention provides a permanent magnet motor phase locking circuit, which comprises a rectifying circuit connected with a permanent magnet motor and a rectifying control circuit connected with the rectifying circuit; the rectifying circuit receives alternating current generated when the permanent magnet motor moves after power failure and converts the alternating current into direct current; the rectification control circuit is used for controlling the short circuit of the positive electrode and the negative electrode of the rectification circuit to form a loop, so that the permanent magnet motor is locked in phase to generate damping force, and the movement of the permanent magnet motor after power failure is buffered. According to the phase-locked circuit of the permanent magnet motor, alternating current generated by movement of the permanent magnet motor after power failure is converted into direct current through the rectifying circuit, and the rectifying circuit is in short circuit through the rectifying circuit to form a loop, so that a coil of the permanent magnet motor generates damping force, the movement of the permanent magnet motor after power failure is buffered, and the movement of the permanent magnet motor after power failure is rapidly stopped.
In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings required to be used in the embodiments will be briefly described below, and it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope of the present invention. Like components are numbered similarly in the various figures.
Fig. 1 is a schematic structural diagram of a phase-locked circuit of a permanent magnet motor according to embodiment 1 of the present invention;
fig. 2 is a schematic structural diagram of a phase-locked circuit of a permanent magnet motor according to embodiment 2 of the present invention;
fig. 3 is a schematic circuit diagram of a phase-locked circuit of a permanent magnet motor according to embodiment 2 of the present invention;
fig. 4 is a schematic structural diagram of a phase-locked circuit of a permanent magnet motor according to embodiment 3 of the present invention;
fig. 5 is a schematic circuit diagram of a phase-locked circuit of a permanent magnet motor according to embodiment 3 of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
Hereinafter, the terms "including", "having", and their derivatives, which may be used in various embodiments of the present invention, are only intended to indicate specific features, numbers, steps, operations, elements, components, or combinations of the foregoing, and should not be construed as first excluding the existence of, or adding to, one or more other features, numbers, steps, operations, elements, components, or combinations of the foregoing.
Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which various embodiments of the present invention belong. The terms (such as those defined in commonly used dictionaries) should be interpreted as having a meaning that is consistent with their contextual meaning in the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein in various embodiments of the present invention.
Example 1
Fig. 1 is a schematic structural diagram of a phase-locked circuit of a permanent magnet motor according to embodiment 1 of the present invention.
The permanent magnet motor phase-locked circuit 100 comprises a rectifying circuit 110 connected with a permanent magnet motor 101, and a rectifying control circuit 120 connected with the rectifying circuit 110;
the rectifying circuit 110 receives alternating current generated when the permanent magnet motor 101 moves after power failure, and converts the alternating current into direct current;
in the embodiment of the present invention, the permanent magnet motor 101 includes a motor having a permanent magnet, such as a dc brush motor, a permanent magnet synchronous motor, a dc brushless motor, a stepping motor, and a servo motor, and is started after being connected to a three-phase ac power supply. When the three-phase ac power supply is disconnected or abnormal, the permanent magnet motor 101 may also rotate rapidly due to inertia or non-inertia, and when the permanent magnet motor 101 is loaded with other mechanical structures, the movement of the permanent magnet motor 101 after power failure may bring adverse effects to other mechanical structures, so it is necessary to buffer the movement of the permanent magnet motor 101 after power failure in time, so that the permanent magnet motor 101 stops moving rapidly after power failure.
In the embodiment of the present invention, since the permanent magnet ferroelectric machine 101 continues to move after being powered off, the permanent magnet ferroelectric machine 101 will generate an alternating current in a reverse direction at this time, that is, the power driving pin of the permanent magnet ferroelectric machine 101 will continuously output the alternating current before the permanent magnet motor 101 stops moving. A rectifying circuit 110 may be connected to a power driving pin of the permanent magnet motor 101, and the rectifying circuit 110 converts an alternating current output when the permanent magnet motor 101 moves after power failure into a direct current. The rectifier circuit 110 converts the alternating current into a direct current, and then outputs the direct current to the positive electrode and the negative electrode of the rectifier circuit 110.
The rectification control circuit 120 is used for controlling short circuit of the positive electrode and the negative electrode of the rectification circuit 110 to form a loop, so that the permanent magnet motor 101 is in phase locking to generate damping force, and movement of the permanent magnet motor 101 after power failure is buffered.
In the embodiment of the present invention, the positive and negative terminals of the rectification circuit 110 may be provided with a rectification control circuit 120, and the rectification control circuit 120 may receive an external control signal and perform a short circuit between the positive and negative terminals of the rectification circuit 110 according to the control instruction, so as to lock the phase of the permanent magnet motor 101 to generate a damping force and buffer the movement of the permanent magnet motor 101 after power failure. For example, in the operating mechanism with the permanent magnet motor 101 installed therein, after the alternating current supply to the permanent magnet motor 101 is stopped, the control command may control the rectification control circuit 120 to perform short-circuit of the positive and negative electrodes of the rectification circuit 110 to form a loop, so as to quickly buffer the movement of the permanent magnet motor 101 after power failure, so that the permanent magnet motor 101 may quickly stop moving.
Example 2
Fig. 2 is a schematic structural diagram of a phase-locked circuit of a permanent magnet motor according to embodiment 2 of the present invention.
The permanent magnet motor phase locking circuit 200 comprises a rectifying circuit 210 connected with a permanent magnet motor 201 and a rectifying control circuit connected with the rectifying circuit 210;
the rectifying circuit 210 receives alternating current generated when the permanent magnet motor 201 moves after power failure, and converts the alternating current into direct current;
the rectification control circuit is used for controlling short circuit of the positive electrode and the negative electrode of the rectification circuit 210 to form a loop, so that the permanent magnet motor 201 is in phase locking to generate damping force, and movement of the permanent magnet motor 201 after power failure is buffered.
The rectification control circuit includes a relay control circuit 220;
the control output end of the relay control circuit 220 is connected to the positive and negative electrodes of the rectifying circuit 210, and is used for receiving a control signal and then enabling the control output end to be in short circuit with the positive and negative electrodes of the rectifying circuit 210.
In the embodiment of the present invention, the short circuit of the positive and negative electrodes of the rectification circuit 210 may be controlled by the relay, that is, the relay control circuit 220 may receive an external control signal, and control the relay therein to perform the short circuit of the positive and negative electrodes of the rectification circuit 210 according to the control signal.
Fig. 3 is a schematic circuit diagram of a phase-locked circuit of a permanent magnet motor according to embodiment 2 of the present invention.
The rectifying circuit 210 includes a first diode 211, a second diode 212, a third diode 213, a fourth diode 214, a fifth diode 215, and a sixth diode 216;
the anode of the first diode 211 is connected to the first phase line 2011 of the permanent magnet motor;
the anode of the second diode 212 is connected to the second phase line 2012 of the permanent magnet ferroelectric motor;
the anode of the third diode 213 is connected to the third phase line 2013 of the permanent magnet motor;
the cathode of the fourth diode 214 is connected to the first phase line 2011 of the permanent magnet motor;
the cathode of the fifth diode 215 is connected to the second phase line 2012 of the permanent magnet ferroelectric motor;
the cathode of the sixth diode 216 is connected to the third phase line 2013 of the permanent magnet motor;
cathodes of the first diode 211, the second diode 212 and the third diode 213 are connected in parallel to be an anode of the rectifying circuit 210;
the anodes of the fourth diode 214, the fifth diode 215, and the sixth diode 216 are connected in parallel to be the cathode of the rectifier circuit 210.
The relay control circuit 220 includes a relay 221, a seventh diode 222, a transistor 223, a first resistor 224, a second resistor 225, a first driving power 226, and a control signal input pin 227;
a first coil pin of the relay 221 is connected to the anode of the first driving power source 226 and the cathode of the seventh diode 222; the second coil pin is connected to the anode of the seven diode;
a common terminal pin 1 of the relay 221 is connected to the positive electrode of the rectifying circuit 210, and a normally closed terminal pin 2 is connected to the negative electrode of the rectifying circuit 210.
The base of the triode 223 is connected to the control signal input pin 227 through the first resistor 224, the collector is connected to the second coil pin of the relay 221, and the emitter is connected to the negative electrode of the first driving power supply 226;
one end of the second resistor 225 is connected to the base of the transistor 223, and the other end is connected to the emitter of the transistor 223.
In the embodiment of the present invention, the transistor 223 is an NPN transistor. When the permanent magnet motor 201 normally works, the triode 223 is turned on after the control signal input pin 227 receives a control signal, the relay 221 and the first driving power supply 226 form a loop to enable the relay 221 to enter a working state, at this time, the common end pin 1 of the relay 221 is connected with the normally open end pin 3, namely, the common end pin 1 is disconnected with the normally closed end pin 2, and the positive electrode and the negative electrode of the rectifying circuit 210 are disconnected. When the movement of the permanent magnet motor 201 needs to be buffered after power failure, the input of the control signal to the control signal input pin 227 can be stopped, the relay 221 immediately stops working, the common terminal pin 1 of the relay 221 is connected with the normally closed terminal pin 2, that is, the positive electrode and the negative electrode of the rectifying circuit 210 are in short circuit, alternating current generated by movement of the permanent magnet motor 201 after power failure is converted into direct current to form a loop, a coil of the permanent magnet motor 201 receives the direct current to generate damping force, and therefore movement of the permanent magnet motor 201 after power failure is buffered, and movement of the permanent magnet motor 201 after power failure is rapidly stopped.
Example 3
Fig. 4 is a schematic structural diagram of a phase-locked circuit of a permanent magnet motor according to embodiment 3 of the present invention.
The permanent magnet motor phase locking circuit 400 comprises an inverter rectification circuit 410 connected with a permanent magnet motor 401, and a relay control circuit 420 connected with the inverter rectification circuit 410;
the inverter rectification circuit 410 is configured to convert a dc power supply into an ac power supply and drive the permanent magnet motor 401 to operate, receive an alternating current generated by the permanent magnet motor 401 when the permanent magnet motor 401 moves after power failure, and convert the alternating current into a dc current.
The control output end of the relay control circuit 420 is connected to the positive and negative electrodes of the rectifying circuit and used for receiving a control signal to enable the control output end to be in short circuit with the positive and negative electrodes of the rectifying circuit.
In the embodiment of the present invention, compared with embodiment 2, another diode-based rectifying circuit is provided to convert the alternating current generated when the permanent magnet motor 401 is powered off and then moves into a direct current, and a parasitic diode of the MOS transistor in the inverter circuit driving the permanent magnet motor 401 can be directly used to form a rectifying circuit, that is, the inverter rectifying circuit 410, so as to further reduce the cost of the phase-locked circuit of the permanent magnet motor 401 and simplify the overall circuit of the permanent magnet motor 401.
Fig. 5 is a schematic circuit diagram of a phase-locked circuit of a permanent magnet motor according to embodiment 3 of the present invention.
The inverter rectification circuit 410 comprises a first MOS transistor 411, a second MOS transistor 412, a third MOS transistor 413, a fourth MOS transistor 414, a fifth MOS transistor 415 and a sixth MOS transistor 416;
the source of the first MOS transistor 411 is connected to the first phase line 4011 of the permanent magnet motor 401;
the source of the second MOS transistor 412 is connected to a second phase line 4012 of the permanent magnet motor 401;
the source of the third MOS transistor 413 is connected to the third phase line 4013 of the permanent magnet motor 401;
the drain of the fourth MOS transistor 414 is connected to the first phase line 4011 of the permanent magnet motor 401;
the drain of the fifth MOS 415 is connected to the second phase line 4012 of the permanent magnet motor 401;
the drain of the sixth MOS transistor 416 is connected to the third phase line 4013 of the permanent magnet motor 401;
the drains of the first MOS transistor 411, the second MOS transistor 412 and the third MOS transistor 413 are connected in parallel to form the positive electrode of the rectifier circuit;
the sources of the fourth MOS transistor 414, the fifth MOS transistor 415, and the sixth MOS transistor 416 are connected in parallel to form a negative stage of the rectifier circuit.
In the embodiment of the present invention, the first MOS transistor 411, the second MOS transistor 412, the third MOS transistor 413, the fourth MOS transistor 414, the fifth MOS transistor 415, and the sixth MOS transistor 416 are N-channel MOS transistors, and the alternating current is converted into the direct current through a parasitic diode of the N-channel MOS transistor.
The inverter rectification circuit 410 further includes an inverter control chip 417, where the inverter control chip 417 is connected to gates of the first MOS transistor 411, the second MOS transistor 412, the third MOS transistor 413, the fourth MOS transistor 414, the fifth MOS transistor 415, and the sixth MOS transistor 416, and controls the inverter circuit to convert a dc power supply into an ac power supply. The positive electrode of the second driving power 418 of the inverter rectification circuit 410 is connected to the normally open terminal pin 3 of the relay, and the negative electrode is connected to the normally closed terminal pin 2 of the relay. That is, when the permanent magnet motor 401 normally operates, the inverter control chip 417 controls the on/off of the MOS transistor to convert the dc second driving power 418 into a three-phase ac power, thereby driving the permanent magnet motor 401 to operate.
The relay control circuit 420 includes a relay 421, a seventh diode 422, a transistor 423, a first resistor 424, a second resistor 425, a first driving power 426, and a control signal input pin 427;
a first coil pin of the relay 421 is connected to an anode of the first driving power source 426 and a cathode of the seventh diode 422; the second coil pin is connected to the anode of the seven diode;
wherein the negative pole of the second driving power source 418 can be connected to the negative pole of the first driving power source 426, i.e., common ground.
A common terminal pin 1 of the relay 421 is connected to the positive electrode of the rectifying circuit, and a normally closed terminal pin 2 is connected to the negative electrode of the rectifying circuit.
The base of the transistor 423 is connected to the control signal input pin 427 through the first resistor 424, the collector of the transistor is connected to the second coil pin of the relay 421, and the emitter of the transistor is connected to the negative electrode of the first driving power source 426;
the second resistor 425 has one end connected to the base of the transistor 423 and the other end connected to the emitter of the transistor 423.
In the embodiment of the present invention, the transistor 423 is an NPN transistor 423.
The invention also provides a permanent magnet motor which comprises the permanent magnet motor phase-locking circuit.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A permanent magnet motor phase-locked circuit is characterized by comprising a rectifying circuit connected with a permanent magnet motor and a rectifying control circuit connected with the rectifying circuit;
the rectifying circuit receives alternating current generated when the permanent magnet motor moves after power failure and converts the alternating current into direct current;
the rectification control circuit is used for controlling the short circuit of the positive electrode and the negative electrode of the rectification circuit to form a loop, so that the permanent magnet motor is locked in phase to generate damping force, and the movement of the permanent magnet motor after power failure is buffered.
2. The permanent magnet motor phase lock circuit according to claim 1, wherein the rectifying circuit comprises a first diode, a second diode, a third diode, a fourth diode, a fifth diode, and a sixth diode;
the anode of the first diode is connected with a first phase line of the permanent magnet motor;
the anode of the second diode is connected with a second phase line of the permanent magnet motor;
the anode of the third diode is connected with a third phase line of the permanent magnet motor;
the cathode of the fourth diode is connected with the first phase line of the permanent magnet motor;
the cathode of the fifth diode is connected with a second phase line of the permanent magnet motor;
the cathode of the sixth diode is connected with a third phase line of the permanent magnet motor;
cathodes of the first diode, the second diode and the third diode are connected in parallel to form an anode of the rectifying circuit;
the anodes of the fourth diode, the fifth diode and the sixth diode are connected in parallel to be the cathode of the rectifying circuit.
3. The phase-locked circuit for permanent magnet motors according to claim 1, wherein the rectifier circuit is an inverter rectifier circuit;
the inverter rectifying circuit is used for converting a direct current power supply into an alternating current power supply and driving the permanent magnet motor to work, receiving alternating current generated by the permanent magnet motor when the permanent magnet motor moves after power failure and converting the alternating current into direct current.
4. The phase-locked circuit for a permanent magnet motor according to claim 3, wherein the inverter rectification circuit comprises a first MOS transistor, a second MOS transistor, a third MOS transistor, a fourth MOS transistor, a fifth MOS transistor and a sixth MOS transistor;
the source electrode of the first MOS tube is connected with a first phase line of the permanent magnet motor;
the source electrode of the second MOS tube is connected with a second phase line of the permanent magnet motor;
the source electrode of the third MOS tube is connected with a third phase line of the permanent magnet motor;
the drain of the fourth MOS transistor is connected with a first phase line of the permanent magnet motor;
the drain of the fifth MOS tube is connected with a second phase line of the permanent magnet motor;
the drain electrode of the sixth MOS tube is connected with a third phase line of the permanent magnet motor;
the drains of the first MOS tube, the second MOS tube and the third MOS tube are connected in parallel to form the anode of the rectifying circuit;
the source electrodes of the fourth MOS tube, the fifth MOS tube and the sixth MOS tube are connected in parallel to form a negative stage of the rectifying circuit.
5. The phase-locked circuit for a permanent magnet motor according to claim 4, wherein the first MOS transistor, the second MOS transistor, the third MOS transistor, the fourth MOS transistor, the fifth MOS transistor, and the sixth MOS transistor are N-channel MOS transistors, and the alternating current is converted into the direct current through a parasitic diode of the N-channel MOS transistor.
6. The phase-locked circuit for permanent magnet motors according to claim 4, wherein the inverter rectification circuit further comprises an inverter control chip, the inverter control chip is connected to the gates of the first MOS transistor, the second MOS transistor, the third MOS transistor, the fourth MOS transistor, the fifth MOS transistor and the sixth MOS transistor, and controls the inverter circuit to convert a DC power supply into an AC power supply.
7. The permanent magnet motor phase lock circuit according to any one of claims 1 to 6, wherein the commutation control circuit comprises a relay control circuit;
and the control output end of the relay control circuit is connected with the positive electrode and the negative electrode of the rectifying circuit and used for receiving a control signal and then enabling the control output end to be in short circuit with the positive electrode and the negative electrode of the rectifying circuit.
8. The permanent magnet motor phase-locked circuit according to claim 7, wherein the relay control circuit comprises a relay, a seventh diode, a triode, a first resistor, a second resistor, a first driving power supply and a control signal input pin;
a first coil pin of the relay is connected to the anode of the first driving power supply and the cathode of the seventh diode; the second coil pin is connected to the anode of the seven diode;
a pin at the public end of the relay is connected with the anode of the rectifying circuit, and a pin at the normally closed end is connected with the cathode of the rectifying circuit;
the base electrode of the triode is connected to the control signal input pin through the first resistor, the collector electrode of the triode is connected to the second coil pin of the relay, the emitter electrode of the triode is connected with the negative electrode of the first driving power supply, and the triode is an NPN type triode;
one end of the second resistor is connected to the base electrode of the triode, and the other end of the second resistor is connected to the emitting electrode of the triode;
and after the permanent magnet motor is powered off, the normally closed end of the relay is connected with the common end.
9. The phase-locked circuit for permanent magnet motors according to claim 8, wherein when the rectifier circuit is an inverter rectifier circuit, the positive electrode of the second driving power source of the inverter rectifier circuit is connected to the normally open terminal pin of the relay, and the negative electrode of the second driving power source of the inverter rectifier circuit is connected to the normally closed terminal pin of the relay.
10. A permanent magnet motor comprising a permanent magnet motor phase-locked circuit according to any one of claims 1 to 9.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011032180.3A CN112054719A (en) | 2020-09-27 | 2020-09-27 | Permanent magnet motor phase-locked circuit and permanent magnet motor |
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| CN202011032180.3A CN112054719A (en) | 2020-09-27 | 2020-09-27 | Permanent magnet motor phase-locked circuit and permanent magnet motor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114301366A (en) * | 2021-12-24 | 2022-04-08 | 兰州飞行控制有限责任公司 | Damper switching circuit controlled by electromagnetic relay |
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2020
- 2020-09-27 CN CN202011032180.3A patent/CN112054719A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114301366A (en) * | 2021-12-24 | 2022-04-08 | 兰州飞行控制有限责任公司 | Damper switching circuit controlled by electromagnetic relay |
| CN114301366B (en) * | 2021-12-24 | 2024-05-31 | 兰州飞行控制有限责任公司 | Damper switching circuit controlled by electromagnetic relay |
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