CN207460021U - The power circuit of position-sensor-free permanent magnet synchronous motor - Google Patents
The power circuit of position-sensor-free permanent magnet synchronous motor Download PDFInfo
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- CN207460021U CN207460021U CN201721520624.1U CN201721520624U CN207460021U CN 207460021 U CN207460021 U CN 207460021U CN 201721520624 U CN201721520624 U CN 201721520624U CN 207460021 U CN207460021 U CN 207460021U
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Abstract
The utility model is related to a kind of power circuit of position-sensor-free permanent magnet synchronous motor, including EMI filter circuit, current rectifying and wave filtering circuit, leakage inductance absorbing circuit, switching mode power supply transformer and switch power controller；220V alternating currents are connected by safety capacitance CX1 and common mode choke LF2 with EMI filter circuit, EMI filter circuit is connected through rectified filter circuit successively and leakage inductance absorbing circuit with two main windings of switching mode power supply transformer T1, and two main windings of switching mode power supply transformer T1 are connected with switch power controller；Two auxiliary winding of switching mode power supply transformer T1 are respectively through the first filter circuit and the second filter circuit output 5V voltages and 20V voltages；A motor soft-start circuit is further included, including motor three-phase bus power filtering capacitor C8 and C9 and synchronous motor rectifier bridge RB2, the synchronized motor of 220V alternating currents charges to motor three-phase bus power filtering capacitor C8, C9 with rectifier bridge RB2.The beneficial effects of the utility model are：Output voltage stabilization, and realize motor delay startup.
Description
Technical field
The utility model is related to a kind of power circuits of position-sensor-free permanent magnet synchronous motor.
Background technology
Without position permanent-magnetic synchronous motor rotor structure due to simple in structure, small, light-weight, the efficient, service life
The advantages that long, is widely applied as power source in industrial circles such as the severe water pump of work condition environment, compressors, driving
For control device in addition to requiring to possess advanced position Sensorless Control algorithm, motor driving plate, which must also possess, is lost low, body
The small and highly reliable requirement of product.
It is existing in permanent magnet synchronous motor drive circuit system, it is general using start when to first pass through big resistance whole to large capacity
It flows filter capacitor to charge, when capacitance voltage is close to line voltage, big resistive short is operated by electromagnetic relay, realize and drive
Movable plate power supply relay soft start function.And electromagnetic relay needs driving circuit and driving power, increases driving switching plate electricity
The output power and fan-out of road transformer cause volume of transformer increase and hydraulic performance decline.Further improve no position
The performance of sensor permanent magnet synchronous electric drive circuit need to design no electromagnetic relay soft-start circuit, realize permanent magnet synchronous electric
Machine is integrated with drive circuit board, meets the industrial circles such as water pump, compressor and position-sensor-free permanent magnet synchronous motor is driven
The requirement of dynamic control device.
Utility model content
The purpose of this utility model is to be directed to more than shortcoming, provides a kind of position-sensor-free permanent magnet synchronous motor
Power circuit, realize output voltage stabilization.
Scheme is used by the utility model solves technical problem：A kind of electricity of position-sensor-free permanent magnet synchronous motor
Source circuit is controlled including EMI filter circuit, current rectifying and wave filtering circuit, leakage inductance absorbing circuit, switching mode power supply transformer and Switching Power Supply
Device；220V alternating currents are connected by safety capacitance CX1 and common mode choke LF2 and the input terminal of EMI filter circuit, EMI filtering
The output terminal of circuit is connected through rectified filter circuit successively and leakage inductance absorbing circuit with two main windings of switching mode power supply transformer T1,
Two main windings of switching mode power supply transformer T1 are connected with switch power controller；Two auxiliary winding difference of switching mode power supply transformer T1
Through the first filter circuit and the second filter circuit output 5V voltages and 20V voltages；Further include a motor soft-start circuit, the electricity
Machine soft-start circuit includes motor three-phase bus power filtering capacitor C8 and C9 and synchronous motor and is handed over rectifier bridge RB2,220V
The synchronized motor of galvanic electricity charges to motor three-phase bus power filtering capacitor C8 and C9 with rectifier bridge RB2；The motor delays
Start-up circuit further includes power switch metal-oxide-semiconductor Q2, the synchronous motor exchange end one end of rectifier bridge RB2 and 220V alternating currents
Firewire L connections, the other end is connected with the zero curve N of 220V alternating currents, and the synchronous motor is defeated with the direct-flow positive pole of rectifier bridge RB2
Outlet is connected with the positive terminal of motor three-phase bus power filtering capacitor C8 and C9, and through resistance R14 and power switch metal-oxide-semiconductor
The grid connection of Q2, the synchronous motor are connected with the direct current cathode output end of rectifier bridge RB2 and the source electrode of power switch metal-oxide-semiconductor Q2
It connects, the drain electrode of power switch metal-oxide-semiconductor Q2 is connected with the negative pole end of motor three-phase bus power filtering capacitor C8 and C9, and is grounded
PGND；The source electrode of power switch metal-oxide-semiconductor Q2 is connected through resistance R15 with the drain electrode of power switch metal-oxide-semiconductor Q2.
Further, the EMI filter circuit is made of resistance Re, capacitance C1, capacitance C2 and inductance L1, the rectification filter
Wave circuit is made of rectifier bridge RB1, capacitance C3 and capacitance C4, and leakage inductance absorbing circuit is by resistance R1, resistance R2, resistance R3, high pressure
Fast recovery diode D1 and capacitance C5 compositions, one end of resistance Re, inductance L1 and capacitance C1 and common mode choke LF2 are wherein
One output terminal connects, and one end of the other end and capacitance C2 of resistance Re and inductance L1 exchanges end with wherein the one of rectifier bridge RB1
Connection, capacitance C1 and the other end of capacitance C2 are connected with another output terminal of common mode choke LF2, another friendship of rectifier bridge RB1
Stream end is connected with the other end of capacitance C2；The direct-flow positive pole output terminal of rectifier bridge RB1 and capacitance C3 positive terminals and capacitance C4, electricity
Resistance R1, resistance R2 connects with one end of capacitance C5, and the direct current cathode output end of rectifier bridge RB1 is grounded PGND, and with capacitance C3
Negative pole end connected with the other end of capacitance C4；Resistance R1, resistance R2 are connected with the other end of capacitance C5, and through a resistance
R3 is connected with the cathode terminal of high-voltage quick-recovery diode D1；Switching mode power supply transformer T1 wherein one end of a main winding and capacitance
One end connection of C5, the other end are connected with the anode tap of high-voltage quick-recovery diode D1.
Further, an accessory power supply current rectifying and wave filtering circuit is further included, by resistance R4, diode D2, capacitance C6 and capacitance
C7 is formed, and one end of capacitance C7 and the negative pole end of capacitance C6 are connected with the direct current cathode output end of rectifier bridge RB1；Capacitance C7's is another
The positive terminal of one end and capacitance C6 are connected with switch power controller, and are connected with the cathode terminal of diode D2, diode D2
Anode tap be connected through resistance R4 with one end of another main windings of switching mode power supply transformer T1, another masters of switching mode power supply transformer T1
The other end ground connection PGND of winding.
Further, the switch power controller is connected with a power switch metal-oxide-semiconductor Q1, power switch metal-oxide-semiconductor Q1's
Grid is connected with the switch power controller, and the source electrode of power switch metal-oxide-semiconductor Q1 is connected simultaneously with the switch power controller
And it is connected through a sampling resistor R5 with the other end of another main winding of switching mode power supply transformer；The drain electrode of power switch metal-oxide-semiconductor Q1
It is connected with the other end of a switching mode power supply transformer wherein main winding.
Further, the firewire L of 220V alternating currents with one end of protective tube F1 and safety capacitance CX1 and is total to through Switching Power Supply
A mould choke coil LF2 wherein input terminals connect, and the other end and common mode of the zero curve N and safety capacitance CX1 of 220V alternating currents are gripped
Another input terminal connection of stream circle LF2.
Further, the driving circuit of a power switch metal-oxide-semiconductor Q2 grids is further included, by resistance R13, capacitance C11, two poles
Pipe D4 and voltage-stabiliser tube DZD2 compositions, the anode tap and power switch of one end of resistance R13, the negative pole end of C11 and voltage-stabiliser tube DZD2
The source electrode connection of metal-oxide-semiconductor Q2, the other end of resistance R13 and the positive terminal of C11 are connected with the cathode terminal of diode D4, diode D4
Anode tap be connected with the cathode terminal of voltage-stabiliser tube DZD2, and through a resistance R12 and synchronous motor with the direct current of rectifier bridge RB2 just
Pole output terminal connection.
Further, first filter circuit is by diode D5, capacitance C12, capacitance C13, resistance R21, inductance L2, electricity
Holding C14 and capacitance C15 to form, one end of the anode tap of diode D5 and a wherein auxiliary winding for switching mode power supply transformer connects,
The cathode terminal of diode D5 and one end of one end of capacitance C12, the positive terminal of capacitance C13, one end of resistance R21 and inductance L2 connect
It connects, the other end of inductance L2 is connected with the positive terminal of one end of capacitance C14 and capacitance C15, the other end, the capacitance C13 of capacitance C12
Negative pole end, the other end of resistance R21, the negative pole end of the other end of capacitance C14 and capacitance C15 and switching mode power supply transformer its
In an auxiliary winding other end connection, and be grounded DGND, the positive terminal of capacitance C15 is the output terminal of 5V power supplys；Described second
Filter circuit is made of diode D6, capacitance C16, capacitance C17, resistance R24, capacitance C18 and capacitance C19；The sun of diode D6
One end extremely with another auxiliary winding of switching mode power supply transformer is connected, the cathode terminal of diode D6 and one end of capacitance C16, electricity
Hold the positive terminal connection of the positive terminal of C17, one end of resistance R24, one end of capacitance C18 and capacitance C19；Capacitance C16's is another
One end, the negative pole end of capacitance C17, the other end of resistance R24, the negative pole end and switch of the other end of capacitance C18 and capacitance C19
The other end connection of another auxiliary winding of power transformer, the positive terminal of capacitance C19 are the output terminal of 20V voltages.
Further, one end one of inductance L2 samples optocoupler feedback circuit and is connected with the switch power controller.
Further, the output terminal of 20V voltages is connected with DC-DC linear voltage decreasing modules, the DC-DC linear voltage decreasings module
Export 15V voltages.
Compared with prior art, the utility model has following advantageous effect：The power switch metal-oxide-semiconductor Q1 of the utility model and
Q2 and diode D1, D2, D4, D5 and D6 realize Sofe Switch, have the characteristics that contactless, high efficiency, high life, and body
Product is small, it can be achieved that motor body is integrated with power drives.While the output voltage that can stablize, need not in addition it increase
The output low voltage DC relay driving power of driving plate switching power circuit transformer, volume of transformer is small, reduces transformer
Fan-out improves motor switch power source performance.
Description of the drawings
The utility model patent is further illustrated below in conjunction with the accompanying drawings.
Fig. 1 is the schematic diagram of the power circuit of position-sensor-free permanent magnet synchronous motor provided by the utility model.
Specific embodiment
The utility model is further illustrated with reference to the accompanying drawings and detailed description.
As shown in Figure 1, a kind of power circuit of position-sensor-free permanent magnet synchronous motor of the present embodiment, is filtered including EMI
Wave circuit, current rectifying and wave filtering circuit, leakage inductance absorbing circuit, switching mode power supply transformer and switch power controller；220V alternating currents lead to
Safety capacitance CX1 and common mode choke LF2 and the input terminal of EMI filter circuit is crossed to connect, the output terminal of EMI filter circuit pass through according to
Secondary rectified filter circuit and leakage inductance absorbing circuit are connected with two main windings of switching mode power supply transformer T1, switching mode power supply transformer T1
Two main windings are connected with switch power controller；Two auxiliary winding of switching mode power supply transformer T1 respectively through the first filter circuit and
Second filter circuit exports 5V voltages and 20V voltages；A motor soft-start circuit is further included, the motor soft-start circuit includes
Motor three-phase bus power filtering capacitor C8 and C9 and synchronous motor rectifier bridge RB2, the synchronized motor of 220V alternating currents are used
Rectifier bridge RB2 charges to motor three-phase bus power filtering capacitor C8 and C9；The motor soft-start circuit further includes work(
Rate switchs metal-oxide-semiconductor Q2, and the synchronous motor is connected with exchange end one end of rectifier bridge RB2 with the firewire L of 220V alternating currents, another
End is connected with the zero curve N of 220V alternating currents, and the synchronous motor is female with the direct-flow positive pole output terminal and motor three-phase of rectifier bridge RB2
Line power filtering capacitor C8 is connected with the positive terminal of C9, and is connected through resistance R14 with the grid of power switch metal-oxide-semiconductor Q2, institute
The direct current cathode output end for stating synchronous motor rectifier bridge RB2 is connected with the source electrode of power switch metal-oxide-semiconductor Q2, power switch MOS
The drain electrode of pipe Q2 is connected with the negative pole end of motor three-phase bus power filtering capacitor C8 and C9, and is grounded PGND；Power switch
The source electrode of metal-oxide-semiconductor Q2 is connected through resistance R15 with the drain electrode of power switch metal-oxide-semiconductor Q2.
From the foregoing, the beneficial effects of the utility model are：The switch power controller is flyback switching
Power-supply controller of electric, 220V alternating currents pass through safety capacitance CX1 and common mode choke LF2, the height of inhibition 220V AC inputs
Frequency disturbs.Again by resistance Re, capacitance C1, capacitance C2 and inductance L1, Switching Power Supply input stage EMI filter functions are completed.Capacitance
C3, C4 filter AC rectification, and resistance R1, R2, R3, high-voltage quick-recovery diode D1 and capacitance C5 complete leakage inductance spike and inhale
Function is received, reduces transformer pair end spike.Diode D2 and capacitance C6, C7 are Switching Power Supply accessory power supply current rectifying and wave filtering circuits,
Power supply is provided for inverse-excitation type switch power-supply controller, resistance R4 is low resistance low-power Chip-R, plays protection switch power supply control
The effect of device processed.Resistance R5 is switch power supply current sampling resistor, monitors metal-oxide-semiconductor Q1 over-current signals, feeds back to Switching Power Supply control
Device processed, the value more than switch power controller maximum current will close metal-oxide-semiconductor grid Q1 drive signals.
In the present embodiment, the EMI filter circuit is made of resistance Re, capacitance C1, capacitance C2 and inductance L1, described whole
Stream filter circuit be made of rectifier bridge RB1, capacitance C3 and capacitance C4, leakage inductance absorbing circuit by resistance R1, resistance R2, resistance R3,
High-voltage quick-recovery diode D1 and capacitance C5 compositions, one end of resistance Re, inductance L1 and capacitance C1 are with common mode choke LF2's
A wherein output terminal connects, and one end of the other end and capacitance C2 of resistance Re and inductance L1 is handed over wherein the one of rectifier bridge RB1
End connection is flowed, capacitance C1 and the other end of capacitance C2 are connected with another output terminal of common mode choke LF2, and rectifier bridge RB1's is another
One exchange end is connected with the other end of capacitance C2；The direct-flow positive pole output terminal of rectifier bridge RB1 and capacitance C3 positive terminals and capacitance
C4, resistance R1, resistance R2 are connected with one end of capacitance C5, the direct current cathode output end of rectifier bridge RB1 ground connection PGND, and with electricity
The negative pole end for holding C3 is connected with the other end of capacitance C4；Resistance R1, resistance R2 are connected with the other end of capacitance C5, and through one
Resistance R3 is connected with the cathode terminal of high-voltage quick-recovery diode D1；Switching mode power supply transformer T1 wherein one end of a main winding with
One end connection of capacitance C5, the other end are connected with the anode tap of high-voltage quick-recovery diode D1.F1 switchs for mains electricity input end
Power supply protective tube；CX1 is the safety capacitance of filter action；LF2 is common mode choke, inhibits High-frequency Interference, with resistance Re, electricity
Hold C1, capacitance C2 and inductance L1 composition Switching Power Supply input stage EMI filter circuits；Resistance R5 is inverse-excitation type switch power-supply controller
Current sampling resistor.
In the present embodiment, further include an accessory power supply current rectifying and wave filtering circuit, by resistance R4, diode D2, capacitance C6 and
Capacitance C7 is formed, and one end of capacitance C7 and the negative pole end of capacitance C6 are connected with the direct current cathode output end of rectifier bridge RB1；Capacitance C7
The other end and the positive terminal of capacitance C6 be connected with switch power controller, and be connected with the cathode terminal of diode D2, two poles
The anode tap of pipe D2 is connected through resistance R4 with one end of another main windings of switching mode power supply transformer T1, and switching mode power supply transformer T1 is another
The other end ground connection PGND of one main winding.Resistance R4, diode D2, capacitance C6 and capacitance C7 are inverse-excitation type switch power-supply auxiliary electricity
Source current rectifying and wave filtering circuit provides power supply for inverse-excitation type switch power-supply controller.
In the present embodiment, the switch power controller is connected with a power switch metal-oxide-semiconductor Q1, power switch metal-oxide-semiconductor
The grid of Q1 is connected with the switch power controller, and source electrode and the switch power controller of power switch metal-oxide-semiconductor Q1 connect
It connects and is connected through a sampling resistor R5 with the other end of another main winding of switching mode power supply transformer；Power switch metal-oxide-semiconductor Q1's
Drain electrode is connected with the other end of a switching mode power supply transformer wherein main winding.
In the present embodiment, the firewire L of 220V alternating currents is through Switching Power Supply one end of protective tube F1 and safety capacitance CX1
Connected with a common mode choke LF2 wherein input terminals, the other end of the zero curve N and safety capacitance CX1 of 220V alternating currents and altogether
Another input terminal connection of mould choke coil LF2.
Further, the driving circuit of a power switch metal-oxide-semiconductor Q2 grids is further included, by resistance R13, capacitance C11, two poles
Pipe D4 and voltage-stabiliser tube DZD2 compositions, the anode tap and power switch of one end of resistance R13, the negative pole end of C11 and voltage-stabiliser tube DZD2
The source electrode connection of metal-oxide-semiconductor Q2, the other end of resistance R13 and the positive terminal of C11 are connected with the cathode terminal of diode D4, diode D4
Anode tap be connected with the cathode terminal of voltage-stabiliser tube DZD2, and through a resistance R12 and synchronous motor with the direct current of rectifier bridge RB2 just
Pole output terminal connection.
In the present embodiment, first filter circuit is by diode D5, capacitance C12, capacitance C13, resistance R21, inductance
One end of L2, capacitance C14 and capacitance C15 compositions, the anode tap of diode D5 and a wherein auxiliary winding for switching mode power supply transformer
Connection, cathode terminal and one end of capacitance C12, the positive terminal of capacitance C13, one end of resistance R21 and the inductance L2 of diode D5
One end connects, and the other end of inductance L2 is connected with the positive terminal of one end of capacitance C14 and capacitance C15, the other end of capacitance C12,
The negative pole end of capacitance C13, the other end of resistance R21, the negative pole end and Switching Power Supply of the other end of capacitance C14 and capacitance C15 become
The other end connection of a wherein auxiliary winding for depressor, and DGND is grounded, the positive terminal of capacitance C15 is the output terminal of 5V power supplys；
Second filter circuit is made of diode D6, capacitance C16, capacitance C17, resistance R24, capacitance C18 and capacitance C19；Two poles
One end of the anode tap of pipe D6 and another auxiliary winding of switching mode power supply transformer connects, cathode terminal and the capacitance C16 of diode D6
One end, the positive terminal of capacitance C17, one end of resistance R24, one end of capacitance C18 and capacitance C19 positive terminal connection；Electricity
Hold the negative of the other end of C16, the negative pole end of capacitance C17, the other end of resistance R24, the other end of capacitance C18 and capacitance C19
The other end extremely with another auxiliary winding of switching mode power supply transformer is connected, and the positive terminal of capacitance C19 is the output of 20V voltages
End.5v voltages are electric motor speed controller power supply, by resistance R21 sampling ends through over-sampling and opto-coupled feedback electronic feedback to flyback
Formula switch power controller keeps the stabilization of 5v；20v_ power supplys pass through DC-DV linear voltage decreasing modules, depressurize as 15v, are motor
The boostrap circuit of three-phase drive bridge and driving are powered.
In the present embodiment, one end one of inductance L2 samples optocoupler feedback circuit and connects with the switch power controller
It connects.
In the present embodiment, the output terminal of 20V voltages is connected with DC-DC linear voltage decreasing modules, the DC-DC linear voltage decreasings
Module exports 15V voltages.
The specific control process of the present embodiment：
220V alternating currents charge to motor three-phase bus power filtering capacitor C8, C9 with rectifier bridge RB2 by synchronous motor,
In the case where power switch metal-oxide-semiconductor Q2 is not turned on, charged by resistance R15 to capacitance C8, C9, charging current maximum is by electricity
Resistance R15 is determined；The voltage that capacitance C8, C9 rectifying and wave-filtering obtains simultaneously charges to capacitance C11 by resistance R12 and diode D4,
When charging voltage reaches power switch metal-oxide-semiconductor Q2 threshold voltage of the grid, power switch metal-oxide-semiconductor Q4 conductings are short-circuit by resistance R15,
When permanent magnet synchronous motor works, the voltage value of busbar voltage subtracts the pressure drop of power switch metal-oxide-semiconductor Q2, voltage-stabiliser tube for line voltage
The grid of DZD2 protection power switch metal-oxide-semiconductors Q2, when permanent magnet synchronous motor is closed, capacitance C11 is discharged by resistance R12, is
Permanent magnet synchronous motor starts slow charge and is ready next time.
In conclusion a kind of power circuit of position-sensor-free permanent magnet synchronous motor provided by the utility model, it can
Output voltage stabilization, and realize motor delay startup.
Above-listed preferred embodiment has been further described the purpose of this utility model, technical solution and advantage,
It should be understood that the above is only the preferred embodiment of the utility model only, it is not intended to limit the utility model, it is all
Within the spirit and principles of the present invention, any modifications, equivalent replacements and improvements are made should be included in this practicality
Within new protection domain.
Claims (9)
1. a kind of power circuit of position-sensor-free permanent magnet synchronous motor, it is characterised in that：Including EMI filter circuit, rectification
Filter circuit, leakage inductance absorbing circuit, switching mode power supply transformer and switch power controller；220V alternating currents pass through safety capacitance
CX1 and common mode choke LF2 and the input terminal of EMI filter circuit connect, and the output terminal of EMI filter circuit is through rectified filter successively
Wave circuit and leakage inductance absorbing circuit are connected with two main windings of switching mode power supply transformer T1, two main windings of switching mode power supply transformer T1 with
Switch power controller connects；Two auxiliary winding of switching mode power supply transformer T1 are respectively through the first filter circuit and the second filtered electrical
Road exports 5V voltages and 20V voltages；A motor soft-start circuit is further included, it is female that the motor soft-start circuit includes motor three-phase
Line power filtering capacitor C8 and C9 and synchronous motor rectifier bridge RB2,220V alternating currents synchronized motor rectifier bridge RB2
It charges to motor three-phase bus power filtering capacitor C8 and C9；The motor soft-start circuit further includes power switch MOS
Pipe Q2, the synchronous motor are connected with exchange end one end of rectifier bridge RB2 with the firewire L of 220V alternating currents, the other end and 220V
The zero curve N connections of alternating current, the synchronous motor are filtered with the direct-flow positive pole output terminal of rectifier bridge RB2 with motor three-phase bus power supply
Ripple capacitance C8 is connected with the positive terminal of C9, and is connected through resistance R14 with the grid of power switch metal-oxide-semiconductor Q2, the synchronous electricity
Machine is connected with the direct current cathode output end of rectifier bridge RB2 with the source electrode of power switch metal-oxide-semiconductor Q2, the leakage of power switch metal-oxide-semiconductor Q2
Pole is connected with the negative pole end of motor three-phase bus power filtering capacitor C8 and C9, and is grounded PGND；Power switch metal-oxide-semiconductor Q2's
Source electrode is connected through resistance R15 with the drain electrode of power switch metal-oxide-semiconductor Q2.
2. the power circuit of position-sensor-free permanent magnet synchronous motor according to claim 1, it is characterised in that：It is described
EMI filter circuit is made of resistance Re, capacitance C1, capacitance C2 and inductance L1, and the current rectifying and wave filtering circuit is by rectifier bridge RB1, electricity
Hold C3 and capacitance C4 compositions, leakage inductance absorbing circuit is by resistance R1, resistance R2, resistance R3, high-voltage quick-recovery diode D1 and electricity
Hold C5 compositions, one end of resistance Re, inductance L1 and capacitance C1 are connected with a wherein output terminal of common mode choke LF2, resistance Re
End is exchanged with the other end of inductance L1 and one end of capacitance C2 with wherein the one of rectifier bridge RB1 to be connected, capacitance C1 and capacitance C2
The other end be connected with another output terminal of common mode choke LF2, another exchange end of rectifier bridge RB1 and the other end of capacitance C2
Connection；The direct-flow positive pole output terminal of rectifier bridge RB1 and capacitance C3 positive terminals and capacitance C4, resistance R1, resistance R2 and capacitance C5
One end connection, the direct current cathode output end ground connection PGND of rectifier bridge RB1, and another with the negative pole end of capacitance C3 and capacitance C4
One end connects；Resistance R1, resistance R2 are connected with the other end of capacitance C5, and recover two poles through a resistance R3 and high-voltage high-speed
The cathode terminal connection of pipe D1；Switching mode power supply transformer T1 wherein one end of a main winding is connected with one end of capacitance C5, the other end
It is connected with the anode tap of high-voltage quick-recovery diode D1.
3. the power circuit of position-sensor-free permanent magnet synchronous motor according to claim 2, it is characterised in that：It further includes
One accessory power supply current rectifying and wave filtering circuit is made of, one end of capacitance C7 and electricity resistance R4, diode D2, capacitance C6 and capacitance C7
The negative pole end for holding C6 is connected with the direct current cathode output end of rectifier bridge RB1；The other end of capacitance C7 and the positive terminal of capacitance C6 with
Switch power controller connects, and is connected with the cathode terminal of diode D2, and the anode tap of diode D2 is through resistance R4 and switch
One end connection of another main windings of power transformer T1, the other end ground connection PGND of another main windings of switching mode power supply transformer T1.
4. the power circuit of position-sensor-free permanent magnet synchronous motor according to claim 3, it is characterised in that：It is described to open
It closes power-supply controller of electric and is connected with a power switch metal-oxide-semiconductor Q1, grid and the switch power controller of power switch metal-oxide-semiconductor Q1
Connection, the source electrode of power switch metal-oxide-semiconductor Q1 are connected with the switch power controller and through a sampling resistor R5 and switch electricity
The other end connection of another main winding of source transformer；The drain electrode of power switch metal-oxide-semiconductor Q1 is led with switching mode power supply transformer wherein one
The other end connection of winding.
5. the power circuit of position-sensor-free permanent magnet synchronous motor according to claim 2, it is characterised in that：220V is handed over
The firewire L of galvanic electricity is through Switching Power Supply protective tube F1 and one end of safety capacitance CX1 and a common mode choke LF2 wherein input terminals
Connection, the zero curve N of 220V alternating currents are connected with the other end of safety capacitance CX1 and another input terminal of common mode choke LF2.
6. the power circuit of position-sensor-free permanent magnet synchronous motor according to claim 1, it is characterised in that：It further includes
The driving circuit of one power switch metal-oxide-semiconductor Q2 grids, is made of resistance R13, capacitance C11, diode D4 and voltage-stabiliser tube DZD2, electricity
One end, the negative pole end of C11 and the anode tap of voltage-stabiliser tube DZD2 of resistance R13 is connected with the source electrode of power switch metal-oxide-semiconductor Q2, resistance
The other end of R13 and the positive terminal of C11 are connected with the cathode terminal of diode D4, and the anode tap of diode D4 is with voltage-stabiliser tube DZD2's
Cathode terminal connects, and is connected through a resistance R12 with synchronous motor with the direct-flow positive pole output terminal of rectifier bridge RB2.
7. the power circuit of position-sensor-free permanent magnet synchronous motor according to claim 1, it is characterised in that：Described
One filter circuit is made of diode D5, capacitance C12, capacitance C13, resistance R21, inductance L2, capacitance C14 and capacitance C15, two poles
One end of the anode tap of pipe D5 and a wherein auxiliary winding for switching mode power supply transformer connects, the cathode terminal and capacitance of diode D5
One end of C12, the positive terminal of capacitance C13, one end of resistance R21 are connected with one end of inductance L2, the other end and the electricity of inductance L2
Hold C14 one end connected with the positive terminal of capacitance C15, the other end of capacitance C12, the negative pole end of capacitance C13, resistance R21 it is another
The other end of a wherein auxiliary winding of one end, the negative pole end of the other end of capacitance C14 and capacitance C15 and switching mode power supply transformer connects
It connects, and is grounded DGND, the positive terminal of capacitance C15 is the output terminal of 5V power supplys；Second filter circuit is by diode D6, electricity
Hold C16, capacitance C17, resistance R24, capacitance C18 and capacitance C19 compositions；The anode tap of diode D6 and switching mode power supply transformer
One end connection of another auxiliary winding, cathode terminal and one end of capacitance C16, the positive terminal of capacitance C17, the resistance R24 of diode D6
One end, capacitance C18 one end and capacitance C19 positive terminal connection；The other end of capacitance C16, the negative pole end of capacitance C17,
The other end of resistance R24, the negative pole end of the other end of capacitance C18 and capacitance C19 and switching mode power supply transformer it is another it is secondary around
The other end connection of group, the positive terminal of capacitance C19 are the output terminal of 20V voltages.
8. the power circuit of position-sensor-free permanent magnet synchronous motor according to claim 7, it is characterised in that：Inductance L2
One end one sample optocoupler feedback circuit be connected with the switch power controller.
9. the power circuit of position-sensor-free permanent magnet synchronous motor according to claim 7, it is characterised in that：20V electricity
The output terminal of pressure is connected with DC-DC linear voltage decreasing modules, and the DC-DC linear voltage decreasings module exports 15V voltages.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721520624.1U CN207460021U (en) | 2017-11-15 | 2017-11-15 | The power circuit of position-sensor-free permanent magnet synchronous motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201721520624.1U CN207460021U (en) | 2017-11-15 | 2017-11-15 | The power circuit of position-sensor-free permanent magnet synchronous motor |
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| CN207460021U true CN207460021U (en) | 2018-06-05 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107634669A (en) * | 2017-11-15 | 2018-01-26 | 福建万润新能源科技有限公司 | The power circuit and its control method of position-sensor-free permagnetic synchronous motor |
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- 2017-11-15 CN CN201721520624.1U patent/CN207460021U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107634669A (en) * | 2017-11-15 | 2018-01-26 | 福建万润新能源科技有限公司 | The power circuit and its control method of position-sensor-free permagnetic synchronous motor |
| CN107634669B (en) * | 2017-11-15 | 2023-09-19 | 福建万润新能源科技有限公司 | Power supply circuit of permanent magnet synchronous motor without position sensor and control method thereof |
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