CN206759350U - A kind of shutdown decompression protection device of permagnetic synchronous motor - Google Patents
A kind of shutdown decompression protection device of permagnetic synchronous motor Download PDFInfo
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- CN206759350U CN206759350U CN201720534807.2U CN201720534807U CN206759350U CN 206759350 U CN206759350 U CN 206759350U CN 201720534807 U CN201720534807 U CN 201720534807U CN 206759350 U CN206759350 U CN 206759350U
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Abstract
The utility model discloses a kind of shutdown decompression protection device of permagnetic synchronous motor, including the energy-storage units electrically connected with machine winding termination and charge and discharge switch module, switch module includes the first one-way SCR D1, second one-way SCR D2 and bidirectional triode thyristor D3, energy-storage units include the first electric capacity C1 and the second electric capacity C2, switch element is provided between first electric capacity C1 and the second electric capacity C2, when the first electric capacity C1 terminal voltage exceedes the voltage of machine winding, switching elements conductive, first electric capacity C1 stops charging, second electric capacity C2 is started to charge up, it is achieved in making full use of the electricity generated in rotor stalling, avoid the generation of excessive heat, save the energy.
Description
Technical field
Motor overvoltages protection technique field is the utility model is related to, more specifically, it relates to a kind of permagnetic synchronous motor
Shutdown decompression protection device.
Background technology
Due to current permagnetic synchronous motor more application three-phase pulse width modulated mode（PWM）Realize sine-wave current control.
Permagnetic synchronous motor has counter electromotive force generation when running, and counter electromotive force is also higher at high speeds.When system breaks down
When, electric machine controller can close driving electric bridge, and now permagnetic synchronous motor is in generating state, and permagnetic synchronous motor will be to control
The bus feedback of device is to raise busbar voltage, after voltage reaches to a certain degree, if protection is not in time, will result in controller
It is badly damaged.At present, prevent the guard method of bus overvoltage from energy bleeder resistance branch road being mainly installed on bus, it is above-mentioned
Method speed is slow, and caused electricity has finally been converted to the heat of above-mentioned bleeder resistance branch road in rotor stalling
Amount, waste energy and cause that the motor feels hot, if radiating is improper, if things go on like this, can also reduce the service life of motor.
Utility model content
Voltage is excessive and amount of heat this problem is produced when releasing when being stalled for permagnetic synchronous motor in practice,
The utility model purpose is the shutdown decompression protection device for proposing a kind of permagnetic synchronous motor, and concrete scheme is as follows：
A kind of shutdown decompression protection device of permagnetic synchronous motor, including the energy-storage units electrically connected with machine winding termination
And charge and discharge switch module, the charge and discharge switch module include,
Charge circuit, including full-wave rectifying circuit, the first one-way SCR D1, inductance L, wherein, the full-wave rectification electricity
The input on road electrically connects with machine winding, and output end electrically connects with the input of the first one-way SCR D1, and described
One one-way SCR D1 output end electrically connects with inductance L one end, and the other end and the energy-storage units of the inductance L connect
Connect；
Discharge loop, including the second one-way SCR D2 being arranged between energy-storage units and the machine winding termination,
The input of the second one-way SCR D2 electrically connects with the energy-storage units, and the other end is electrically connected with the machine winding termination
Connect；
The energy-storage units include one-level energy-storage travelling wave tube and two level energy-storage travelling wave tube at least two-stage energy-storage travelling wave tube,
One end of the one-level energy-storage travelling wave tube including the first electric capacity C1, the first electric capacity C1 after first resistor R1 with institute
State one end electrical connections of the inductance L away from the first one-way SCR D1, other end ground connection；
The two level energy-storage travelling wave tube includes the second electric capacity C2, the second electric capacity C2 one end through switch element, the second electricity
Resistance R2 electrically connects with the one end of the inductance L away from the first one-way SCR D1, other end ground connection；
Wherein, the conducting control terminal of the switch element is coupled between the first electric capacity C1 and the inductance L；
Coupled between the second electric capacity C2 and the switch element with one end of a bidirectional triode thyristor D3, it is described it is two-way can
The control silicon D3 other end is coupled to the machine winding termination；
The first one-way SCR D1, the second one-way SCR D2 and bidirectional triode thyristor D3 control pole and motor
Frequency-variable controller control connection.
Further, grid of the switch element including NMOS tube a Q, the NMOS tube Q is coupled to first electricity
Between holding C1 and inductance L, source electrode is coupled to the one end of the inductance L away from the first one-way SCR D1, and drain electrode is coupled to
One end of the second electric capacity C2.
Further, it is serially connected with the first Current Limiting Diodes D4 between the inductance L and the first electric capacity C1, described first
Current Limiting Diodes D4 positive poles are coupled to the inductance L, and negative pole is coupled to the first electric capacity C1, the grid coupling of the NMOS tube Q
It is connected between the first Current Limiting Diodes D4 negative poles and the first electric capacity C1.
Further, it is serially connected with the second Current Limiting Diodes D5 between the NMOS tube Q and the second electric capacity C2, described
Two Current Limiting Diodes D5 positive pole is coupled to the drain electrode of the NMOS tube Q, and negative pole is coupled to the second electric capacity C2.
Further, the charge circuit on discharge loop with being arranged in parallel voltage stabilizing element, the voltage stabilizing element bag
Include voltage-regulator diode D6.
Further, the saturation voltage of the first electric capacity C1 is more than the saturation voltage of the second electric capacity C2.
When permagnetic synchronous motor stops driving, its internal rotor is still rotating, and permagnetic synchronous motor now is suitable
In a generator, the energy that its rotor rotates can be transformed into electricity and feed back in winding, Pass through above-mentioned technical proposal, and all-wave is whole
Current circuit is DC pulse current first by the AC conversion in winding, and the inductance L in charge circuit is by above-mentioned DC pulse
Electric current becomes more smooth, is advantageous to charge to the first electric capacity C1, in charging process, the first Current Limiting Diodes D4 energy
Enough limitation senses of current are inputted into the first electric capacity C1 by inductance L.After the first electric capacity C1 electricity saturation, due to motor around
Voltage in group is gradually reduced, and its one end can produce saturation voltage, and now the size of saturation voltage is not less than in machine winding
Voltage, above-mentioned first electric capacity C1 saturation voltage are more than the conducting voltage of switch element, i.e. NMOS tube Q, now, above-mentioned switch member
Part is turned on, and the electric current from machine winding is input in the second electric capacity C2, and above-mentioned second Current Limiting Diodes D5 can ensure electric current
Inputted by inductance L into the second electric capacity C2, the as whole course of work for shutting down decompression protection device of said process, multistage electric capacity
Advantage in the electric current in it can maximumlly absorb machine winding, reduce the amount that electric current is flowed into ground through elements such as resistance,
So as to reduce the generation of heat.When permagnetic synchronous motor starts, the above-mentioned electricity being stored in electric capacity can export, and promote forever
The startup of magnetic-synchro motor, its detailed process are：The first one-way SCR D1, second unidirectional controllable is controlled using frequency-variable controller
Silicon D2 and bidirectional triode thyristor D3 conducting and shut-off, so as to control cut-offfing for discharge loop, with this by the electricity weight in electric capacity
Newly it imported into machine winding.
Compared with prior art, the beneficial effects of the utility model are as follows：
（1）Stored by the way that electric current caused by machine winding is imported into electric capacity, avoid caused hair during current drain
Thermal phenomenon；
（2）By setting multistage energy-storage travelling wave tube so that electricity caused by rotor rotation can be by receipts as much as possible
Collection storage, reduces the generation of heat；
（3）By setting the switch elements such as corresponding controllable silicon, the intelligent control of discharge and recharge is realized so that deposited in electric capacity
The electricity of storage can be used for the startup of permagnetic synchronous motor, save the energy.
Brief description of the drawings
Fig. 1 is integrated circuit schematic diagram of the present utility model.
Accompanying drawing mark：1st, energy-storage units；2nd, full-wave rectifying circuit；3rd, charge circuit；4th, discharge loop.
Embodiment
In the utility model, for one-way SCR and bidirectional triode thyristor D3, its input is the anode of controllable silicon, defeated
Go out end i.e. negative electrode, be the flow direction for clearly illustrating electric current in controllable silicon, replaced using input and output end name.
With reference to embodiment and accompanying drawing, the utility model is described in further detail, but implementation of the present utility model
Mode is not limited only to this.
As shown in figure 1, a kind of shutdown decompression protection device of permagnetic synchronous motor, including electrically connected with machine winding termination
Energy-storage units 1 and charge and discharge switch module.
Charge and discharge switch module includes charge circuit 3 and discharge loop 4, wherein：
Charge circuit 3, including full-wave rectifying circuit 2, the first one-way SCR D1, inductance L.Full-wave rectifying circuit 2 such as Fig. 1
Shown, the input of full-wave rectifying circuit 2 electrically connects with machine winding, output end and the first one-way SCR D1 input electricity
Connection, the first one-way SCR D1 output end electrically connect with inductance L one end, and inductance the L other end and energy-storage units 1 connect
Connect.It is DC pulse current that full-wave rectifying circuit 2 in such scheme, which is mainly used in the AC conversion in machine winding, electricity
Sense L main function is so that pulse current is more smooth, is advantageous to the charging of electric capacity, and the first one-way SCR D1 can be with
The charging process of energy-storage units 1 is accurately controlled according to control signal.
For discharge loop 4, including the second one-way SCR being arranged between energy-storage units 1 and machine winding termination
D2, the second one-way SCR D2 input electrically connect with energy-storage units 1, and the other end electrically connects with machine winding termination.Second
One-way SCR D2 conducting is with turning off with the control signal of its control pole closely related, above-mentioned technical proposal so that electric capacity fills
Discharge process control after full electricity is more accurate simple, and the electric energy in energy-storage units 1 is used to the startup of motor beneficial to the later stage
During go.
Because permagnetic synchronous motor is in stalling, the velocity of rotation of rotor can be gradually reduced, and cause to produce in winding
Voltage be also gradually reduced, when the voltage in machine winding be less than energy-storage units 1 voltage when, energy-storage units 1 will not be stored in
Energy.Therefore, in the utility model, energy-storage units 1 include one-level energy-storage travelling wave tube and at least two-stage energy storage of two level energy-storage travelling wave tube
Element.
As shown in figure 1, one end of one-level energy-storage travelling wave tube including the first electric capacity C1, the first electric capacity C1 after first resistor R1 with
One end electrical connections of the inductance L away from the first one-way SCR D1, other end ground connection, when the first one-way SCR D1 is on shape
During state, above-mentioned first electric capacity C1 is started to charge up.
Two level energy-storage travelling wave tube includes the second electric capacity C2, the second electric capacity C2 one end through switch element, second resistance R2 and electricity
Feel one end electrical connections of the L away from the first one-way SCR D1, the other end is grounded, when above-mentioned switching elements conductive, described second
Electric capacity C2 is started to charge up.
Wherein, the conducting control terminal of switch element is coupled between the first electric capacity C1 and inductance L.
For convenience the second electric capacity C2 discharge, between the second electric capacity C2 and switch element with one end of a bidirectional triode thyristor D3
Coupling, the bidirectional triode thyristor D3 other end are coupled to machine winding termination.
In order to facilitate the discharge and recharge of electric capacity, the first one-way SCR D1, the second one-way SCR D2 and bidirectional triode thyristor
D3 control pole and the frequency-variable controller control of motor connect.
In the utility model, switch element includes a NMOS tube Q, NMOS tube Q grid be coupled to the first electric capacity C1 with
Between inductance L, source electrode is coupled to the one end of inductance L away from the first one-way SCR D1, and drain electrode is coupled to the one of the second electric capacity C2
End.Above-mentioned setting so that after the first electric capacity C1 terminal voltage reaches certain value, NMOS tube Q conductings, electric energy can now be deposited
Store up into the second electric capacity C2, because the first electric capacity C1 terminal voltage can be gradually increasing during charging, and in machine winding
Voltage can but be gradually reduced.Preferably, above-mentioned NMOS tube Q conducting voltage is configured to the first electric capacity C1 terminal voltage curves
With the intersection point of the voltage curve in machine winding.After this, the voltage of machine winding is less than the first electric capacity C1 voltage, shut-off
First electric capacity C1 and machine winding, turn on the connection between the second electric capacity C2 and machine winding, power storage to the second electric capacity C2
In, so continue to store the electric energy in machine winding.
In order to avoid the electric current in the first electric capacity C1 in charging process is reversely flowed out in machine winding, inductance L and
The first Current Limiting Diodes D4 is serially connected between one electric capacity C1, the first Current Limiting Diodes D4 positive poles are coupled to inductance L, and negative pole is coupled to
First electric capacity C1, NMOS tube Q grid are coupled between the first Current Limiting Diodes D4 negative poles and the first electric capacity C1.
Meanwhile in order to avoid the electricity outflow in the second electric capacity C2, second is serially connected between NMOS tube Q and the second electric capacity C2
Current Limiting Diodes D5, the second Current Limiting Diodes D5 positive pole are coupled to NMOS tube Q drain electrode, and negative pole is coupled to the second electric capacity C2.
Optimization, because rotor is when rotating, some uncertain factors be present, cause the electric current in electronics winding
It is possible to be mutated, switch element is caused damage in order to avoid the voltage of mutation, on charge circuit 3 and discharge loop 4
Voltage stabilizing element is arranged in parallel, voltage stabilizing element includes voltage-regulator diode D6, one end ground connection of voltage stabilizing element.
In the utility model, the first electric capacity C1 saturation voltage is more than the second electric capacity C2 saturation voltage.
When permagnetic synchronous motor stops driving, its internal rotor is still rotating, and permagnetic synchronous motor now is suitable
In a generator, energy that its rotor rotates can be transformed into electricity and feed back in winding, with the rotation of rotor, in the windings
The sine wave alternating current that amplitude is gradually reduced will be produced.Full-wave rectifying circuit 2 in such scheme is first by the friendship in winding
Stream electricity is converted into DC pulse current, and above-mentioned DC pulse current is become more smooth by the inductance L in charge circuit 3, is had
Charged beneficial to the first electric capacity C1.In charging process, the first Current Limiting Diodes D4 can limit sense of current by electricity
Sense L is inputted into the first electric capacity C1.After the first electric capacity C1 electricity saturation, because the voltage in machine winding is gradually reduced,
Its one end can produce saturation voltage, and now the size of saturation voltage is not less than the voltage in machine winding, above-mentioned first electric capacity C1
Saturation voltage be more than the conducting voltage of switch element, i.e. NMOS tube Q, now, above-mentioned switching elements conductive, from machine winding
Electric current be input in the second electric capacity C2, above-mentioned second Current Limiting Diodes D5 can ensure electric current by inductance L input to second electricity
Hold in C2, said process is the whole course of work for shutting down decompression protection device, and the advantage of multistage electric capacity is can be maximum
Electric current in the absorption machine winding of change, the amount that electric current is flowed into ground through elements such as resistance is reduced, so as to reduce the generation of heat.
When permagnetic synchronous motor starts, the above-mentioned electricity being stored in electric capacity can export, and promote the startup of permagnetic synchronous motor, profit
The first one-way SCR D1, the second one-way SCR D2 and bidirectional triode thyristor D3 conducting and pass are controlled with frequency-variable controller
It is disconnected, so as to control cut-offfing for discharge loop 4, electricity in electric capacity is imported into machine winding again with this, import motor around
The frequency of group is equal with the output frequency of motor inverter.
Described above is only preferred embodiment of the present utility model, and the scope of protection of the utility model is not limited merely to
Above-described embodiment, all technical schemes belonged under the utility model thinking belong to the scope of protection of the utility model.It should refer to
Go out, for those skilled in the art, some improvement under the premise of the utility model principle is not departed from and
Retouching, these improvements and modifications also should be regarded as the scope of protection of the utility model.
Claims (6)
1. a kind of shutdown decompression protection device of permagnetic synchronous motor, including the energy-storage units electrically connected with machine winding termination
And charge and discharge switch module (1), it is characterised in that
The charge and discharge switch module includes,
Charge circuit (3), including full-wave rectifying circuit (2), the first one-way SCR D1, inductance L, wherein, the full-wave rectification
The input of circuit (2) electrically connects with machine winding, and output end electrically connects with the input of the first one-way SCR D1, institute
The output end for stating the first one-way SCR D1 electrically connects with inductance L one end, the other end and the energy-storage units of the inductance L
(1) connect；
Discharge loop (4), including the second one-way SCR being arranged between energy-storage units (1) and the machine winding termination
D2, the input of the second one-way SCR D2 electrically connect with the energy-storage units (1), the other end and the motor winding terminal
Head electrical connection；
The energy-storage units (1) include one-level energy-storage travelling wave tube and two level energy-storage travelling wave tube at least two-stage energy-storage travelling wave tube,
One end of the one-level energy-storage travelling wave tube including the first electric capacity C1, the first electric capacity C1 after first resistor R1 with the electricity
Feel one end electrical connections of the L away from the first one-way SCR D1, other end ground connection；
The two level energy-storage travelling wave tube includes the second electric capacity C2, and one end of the second electric capacity C2 is through switch element, second resistance R2
Electrically connected with the one end of the inductance L away from the first one-way SCR D1, other end ground connection；
Wherein, the conducting control terminal of the switch element is coupled between the first electric capacity C1 and the inductance L；
One end between the second electric capacity C2 and the switch element with a bidirectional triode thyristor D3 couples, the bidirectional triode thyristor
The D3 other end is coupled to the machine winding termination；
The first one-way SCR D1, the second one-way SCR D2 and bidirectional triode thyristor D3 control pole and the frequency conversion of motor
Controller control connection.
2. the shutdown decompression protection device of permagnetic synchronous motor according to claim 1, it is characterised in that the switch member
The grid that part includes NMOS tube a Q, the NMOS tube Q is coupled between the first electric capacity C1 and inductance L, and source electrode is coupled to institute
The one end of inductance L away from the first one-way SCR D1 is stated, drain electrode is coupled to one end of the second electric capacity C2.
3. the shutdown decompression protection device of permagnetic synchronous motor according to claim 2, it is characterised in that the inductance L
The first Current Limiting Diodes D4 is serially connected between the first electric capacity C1, the first Current Limiting Diodes D4 positive poles are coupled to described
Inductance L, negative pole are coupled to the first electric capacity C1, and the grid of the NMOS tube Q is coupled to the first Current Limiting Diodes D4 and born
Between pole and the first electric capacity C1.
4. the shutdown decompression protection device of permagnetic synchronous motor according to claim 2, it is characterised in that the NMOS tube
The second Current Limiting Diodes D5 is serially connected between Q and the second electric capacity C2, the positive pole of the second Current Limiting Diodes D5 is coupled to
The drain electrode of the NMOS tube Q, negative pole are coupled to the second electric capacity C2.
5. the shutdown decompression protection device of permagnetic synchronous motor according to claim 1, it is characterised in that described to charge back
With being arranged in parallel voltage stabilizing element on discharge loop (4), the voltage stabilizing element includes voltage-regulator diode D6 on road (3).
6. the shutdown decompression protection device of permagnetic synchronous motor according to claim 1, it is characterised in that first electricity
The saturation voltage for holding C1 is more than the saturation voltage of the second electric capacity C2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720534807.2U CN206759350U (en) | 2017-05-13 | 2017-05-13 | A kind of shutdown decompression protection device of permagnetic synchronous motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720534807.2U CN206759350U (en) | 2017-05-13 | 2017-05-13 | A kind of shutdown decompression protection device of permagnetic synchronous motor |
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| Publication Number | Publication Date |
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| CN206759350U true CN206759350U (en) | 2017-12-15 |
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| CN201720534807.2U Active CN206759350U (en) | 2017-05-13 | 2017-05-13 | A kind of shutdown decompression protection device of permagnetic synchronous motor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110492800A (en) * | 2019-07-25 | 2019-11-22 | 江苏科技大学 | Permanent magnet synchronous motor diode continuousing flow eliminates residual magnetic devices and application method |
| CN110855190A (en) * | 2019-11-25 | 2020-02-28 | 珠海格力电器股份有限公司 | Motor control method, device and motor system |
-
2017
- 2017-05-13 CN CN201720534807.2U patent/CN206759350U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110492800A (en) * | 2019-07-25 | 2019-11-22 | 江苏科技大学 | Permanent magnet synchronous motor diode continuousing flow eliminates residual magnetic devices and application method |
| CN110492800B (en) * | 2019-07-25 | 2021-05-11 | 江苏科技大学 | Device for eliminating residual magnetism by diode freewheeling of permanent magnet synchronous motor and using method |
| CN110855190A (en) * | 2019-11-25 | 2020-02-28 | 珠海格力电器股份有限公司 | Motor control method, device and motor system |
| CN110855190B (en) * | 2019-11-25 | 2021-03-12 | 珠海格力电器股份有限公司 | Motor control method, device and motor system |
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