CN202940766U - Single-phase permanent magnet synchronous motor drive circuit - Google Patents
Single-phase permanent magnet synchronous motor drive circuit Download PDFInfo
- Publication number
- CN202940766U CN202940766U CN2012206179007U CN201220617900U CN202940766U CN 202940766 U CN202940766 U CN 202940766U CN 2012206179007 U CN2012206179007 U CN 2012206179007U CN 201220617900 U CN201220617900 U CN 201220617900U CN 202940766 U CN202940766 U CN 202940766U
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- power
- power switch
- phase permanent
- drive circuit
- switch pipe
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Abstract
The utility model provides a low cost single-phase permanent magnet synchronous motor drive circuit, comprising a dual voltage rectifying dual-power circuit. Output ends of the dual voltage rectifying dual-power circuit are respectively a direct-current output DC+, a direct-current output DC-, and a power center line point DC0 as a basis reference. The drive circuit comprises two power switch tubes K1 and K2, respectively forming an upper bridge arm and a lower bridge arm. The power center line point DC0 is connected with another leading-out terminal of a stator coil of a motor. The upper bridge arm K1 is connected with the direct-current output DC+. The lower bridge arm K2 is connected with the direct-current output DC-. Through dual voltage rectification, a DC dual-voltage power supply is obtained, and the DC dual-voltage power supply is provided for the single-phase permanent magnet synchronous motor drive circuit. Thus, two high-price power switch tubes are saved, and the drive circuit just needs a pair of power switch tubes. Correspondingly, cost of the drive circuit of a power switching device is reduced, and reduction of devices further improves reliability of the circuit.
Description
Technical field
The utility model relates to a kind of drive circuit of single-phase permanent-magnet synchronous motor.
Background technology
In recent years, power electronics and variable-frequency driving technique are day by day ripe, on the basis of three-phase motor with permanent magnets (PMSM) frequency conversion drive, expedited the emergence of the more simple and practical single-phase permanent-magnet synchronous motor of a kind of structure (SPMSM), its structural principle as shown in Figure 1, be a kind of 4 utmost point phase structures, its rotor is p-m rotor.
To the driving of this motor, be all at present the driving circuit structure of copying three phase electric machine, as shown in Figure 2.For the motor of middle low power, its power circuit as shown in Figure 3.
Above power circuit and the characteristics of drive circuit are directly to copy the three phase electric machine drive axle, use 4 device for power switching, and the cost cost is higher, though can satisfy basic demand, still have the leeway of simplification.
The utility model content
The utility model provides a kind of driving circuit of single-phase permanent magnet synchronous motor cheaply.
By the following technical solutions:
A kind of driving circuit of single-phase permanent magnet synchronous motor comprises the voltage-doubler rectification two-supply circuit, and the output of described voltage-doubler rectification two-supply circuit is respectively direct current output DC+, direct current output DC-and as the power supply centerline DC0 with reference to benchmark; The lead end A conducting of the stator coil of power center's point DC0 and single-phase permanent motor; Be provided with current sensor CS1 at power center's point DC0 between lead end A; Described direct current output DC+ electric connection is to the input Ka of power switch pipe K1; Described direct current output DC-electric connection is to the input Kb of power switch pipe K2; The equal electric connection of output Ka of the output Kb of power switch pipe K1 and power switch pipe K2 is to another lead end B of the stator coil of single-phase permanent motor; The gate pole G electric connection of power switch pipe K1 is to the switching signal UH end of single-phase permanent motor; The gate pole G electric connection of power switch pipe K2 is to the switching signal UL end of single-phase permanent motor.
The utility model obtains the direct current double-voltage electric power by voltage-doubler rectification, offers the single-phase permanent motor-drive circuit, can save two power switch pipes that price is valuable, and only needs a pair of power switch pipe to get final product.Correspondingly, to the also corresponding minimizing of drive circuit cost of device for power switching, and the minimizing of device can further improve the reliability of circuit.
Description of drawings
Fig. 1 is the fundamental diagram of single-phase permanent-magnet synchronous motor;
Fig. 2 is the driving circuit structure figure of existing single-phase permanent-magnet synchronous motor;
Fig. 3 is the circuit construction of electric power figure of existing single-phase permanent-magnet synchronous motor;
Fig. 4 is the driving circuit structure figure of embodiment.
Embodiment
Below in conjunction with drawings and Examples, the utility model content is described further.
As shown in Figure 4, the driving circuit of single-phase permanent magnet synchronous motor of the present embodiment, comprise the voltage-doubler rectification two-supply circuit, the output of described voltage-doubler rectification two-supply circuit is respectively direct current output DC+, direct current output DC-and as the power supply centerline DC0 with reference to benchmark.
In the present embodiment, voltage-doubler rectification two-supply circuit structure is as follows: the positive pole of diode D1 is communicated to the positive pole of electric capacity E1; The negative pole of electric capacity E1 is communicated to the positive pole of electric capacity E2; The negative pole of electric capacity E2 is communicated to the negative pole of diode D2; The positive pole of diode D2 is communicated to the negative pole of diode D1; Ac input end AC1 is communicated to the negative pole of diode D1; Ac input end AC2 is communicated to the negative pole of electric capacity E1; The just very direct current output DC+ of electric capacity E1; The negative pole of electric capacity E1 is power center's point DC0; The negative pole of electric capacity E2 is direct current output DC-.
The lead end A conducting of the stator coil of power center's point DC0 and single-phase permanent motor; Be provided with current sensor CS1 at power center's point DC0 between lead end A; Described direct current output DC+ electric connection is to the input Ka of power switch pipe K1; Described direct current output DC-electric connection is to the input Kb of power switch pipe K2; The equal electric connection of output Ka of the output Kb of power switch pipe K1 and power switch pipe K2 is to another lead end B of the stator coil of single-phase permanent motor; The gate pole G electric connection of power switch pipe K1 is to the switching signal UH end of single-phase permanent motor; The gate pole G electric connection of power switch pipe K2 is to the switching signal UL end of single-phase permanent motor.
The operation principle of voltage-doubler rectification two-supply circuit is as follows: diode D1 and electric capacity E1 are to the positive half cycle rectification of AC power energy storage filtering; Diode D2 and electric capacity E2 are to AC power negative half period rectification energy storage filtering.Electric capacity E1, electric capacity E2 play the induced current that absorbs from motor simultaneously, coordinate the fly-wheel diode in power switch pipe K1, power switch pipe K2.
The operation principle of the present embodiment drive circuit is as follows: according to the position of motor permanent magnetic rotor, power switch pipe K1, power switch pipe K2 are logical with mutual exclusion land wheel conductance;
When the switching signal UH of single-phase permanent motor makes power switch pipe K1 conducting, provide electric energy by the electric capacity E1 of energy storage, current path is as follows:
The negative pole of the lead end A of the lead end B of the positive pole of electric capacity E1 → power switch pipe K1 → stator coil → stator coil winding → stator coil → electric capacity E1.
When the switching signal UL of single-phase permanent motor makes power switch pipe K2 conducting, provide electric energy by the electric capacity E2 of energy storage, current path is as follows:
The negative pole of the lead end B of the lead end A of positive pole → stator coil of electric capacity E2 → stator coil winding → stator coil → power switch pipe K2 → electric capacity E2.
Like this, by the conducting order of power ratio control switching tube K1, power switch pipe K2, can play the electric current commutation of single-phase permanent motor is controlled.
Power switch pipe K1 and power switch pipe K2 can select according to the circuit needs, and as IGBT, MOSFET etc., positive logic triggers or the negative logic triggering all can.
The low-voltage dc power supply that signal is processed and drive circuit uses, if be non-isolation, its access point with reference to ground GND can be chosen as required, direct current output DC+, direct current are exported DC-, power center's point DCO and all can.Also can use the low-tension supply power supply of isolation, correspondingly, must use the isolation coupling device to the driving of power switch pipe K1, power switch pipe K2.
The driving circuit of single-phase permanent magnet synchronous motor of this structure has simple in structure, high reliability.
What this specification was enumerated is only better embodiment of the present utility model, and all equivalent technologies conversion of doing under operation principle of the present utility model and thinking all are considered as protection range of the present utility model.
Claims (1)
1. a driving circuit of single-phase permanent magnet synchronous motor, comprise the voltage-doubler rectification two-supply circuit, and the output of described voltage-doubler rectification two-supply circuit is respectively direct current output DC+, direct current output DC-and as the power supply centerline DC0 with reference to benchmark; The lead end A conducting of the stator coil of power center's point DC0 and single-phase permanent motor; Be provided with current sensor CS1 at power center's point DC0 between lead end A; Described direct current output DC+ electric connection is to the input Ka of power switch pipe K1; Described direct current output DC-electric connection is to the input Kb of power switch pipe K2; The equal electric connection of output Ka of the output Kb of power switch pipe K1 and power switch pipe K2 is to another lead end B of the stator coil of single-phase permanent motor; The gate pole G electric connection of power switch pipe K1 is to the switching signal UH end of single-phase permanent motor; The gate pole G electric connection of power switch pipe K2 is to the switching signal UL end of single-phase permanent motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012206179007U CN202940766U (en) | 2012-11-20 | 2012-11-20 | Single-phase permanent magnet synchronous motor drive circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012206179007U CN202940766U (en) | 2012-11-20 | 2012-11-20 | Single-phase permanent magnet synchronous motor drive circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202940766U true CN202940766U (en) | 2013-05-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012206179007U Expired - Lifetime CN202940766U (en) | 2012-11-20 | 2012-11-20 | Single-phase permanent magnet synchronous motor drive circuit |
Country Status (1)
| Country | Link |
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| CN (1) | CN202940766U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111717024A (en) * | 2020-06-11 | 2020-09-29 | 重庆长安新能源汽车科技有限公司 | Coaxial electric drive axle power assembly with disconnecting mechanism |
-
2012
- 2012-11-20 CN CN2012206179007U patent/CN202940766U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111717024A (en) * | 2020-06-11 | 2020-09-29 | 重庆长安新能源汽车科技有限公司 | Coaxial electric drive axle power assembly with disconnecting mechanism |
| CN111717024B (en) * | 2020-06-11 | 2023-03-24 | 重庆长安新能源汽车科技有限公司 | Coaxial electric drive axle power assembly with disconnecting mechanism |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130515 |
|
| CX01 | Expiry of patent term |