CN205725502U - A kind of many level power topological structure of switched reluctance machines - Google Patents

Abstract

The utility model discloses many level power topological structure of a kind of switched reluctance machines, between traditional asymmetric power conversion circuit and DC source, increase booster circuit part, including: electric capacity C₁, boost capacitor C₂, antiparallel switch transistor T₁With diode D₁, antiparallel switch transistor T₃With diode D₃, by switch transistor T₂With diode D₂₁、D₂₂、D₂₃、D₂₄The two-way switch constituted.By controlling conducting and the shutoff of power topology breaker in middle pipe, switched reluctance machines switchover operation under high-speed excitation (+2), quickly demagnetization (2), normal excitation (+1), normal demagnetization (1) and (0) five kind of state of afterflow can be made.This utility model achieves high-speed excitation and the quickly demagnetization of switched reluctance machines, and solve exciting current during motor runs rise, decline slowly, system effectiveness and the problem such as dynamic property is low, it is that one has high robust, high reliability, intelligentized structure, there is huge application prospect.

Description

A kind of many level power topological structure of switched reluctance machines

Technical field

This utility model relates to the power conversion circuit of a kind of motor, is specifically related to many level of a kind of switched reluctance machines Power topology.

Background technology

Switched reluctance machines has the advantages such as high, big, the low cost of manufacture of detent torque of reliability, its power topology one The focus of Zhi Shi various countries expert research, suitable topological structure can reduce the cost of switched reluctance machines, improves switching magnetic-resistance The dynamic characteristic of motor, widens the application scenario of switched reluctance machines.At the most frequently used asymmetrical half-bridge power conversion circuit On the basis of four level circuits that propose of document " switched reluctance machines Instantaneous torque control based on four-level converter " It is not provided that normal demagnetized state；Document " the direct Instantaneous torque control of switched reluctance machines under five level topologys " is only applicable to idol Number phase switch reluctance motor；Document " Novel Active Boost Power Converter for SR Drive " proposes A kind of actively booster circuit, but there is no normal demagnetized state, simultaneously boost capacitor C₂Also circuit feedback electric energy can only be relied on to fill Electricity.This utility model is directed to a kind of many level driving circuits of novel switched reluctance motor, makes switched reluctance machines multiple Switchover operation under varying level pattern, solve motor be in operation exciting current rise, decline slowly, system effectiveness and dynamic The problem that energy is low.

Utility model content

Problem to be solved in the utility model is to improve the deficiency in existing power circuit, it is provided that a kind of novel switched magnetic Many level power topological structure of resistance motor, by controlling conducting and the shutoff of power topology breaker in middle pipe, makes switching magnetic-resistance electricity Machine is switchover operation under multiple varying level pattern, and solution motor is in operation, and exciting current rises, decline is slow, system effectiveness The problem low with dynamic property.

The technical solution of the utility model is: many level power topological structure of a kind of switched reluctance machines, including one DC source, booster circuit, an asymmetrical half-bridge power conversion circuit, it is characterised in that described DC source is AC rectification is become galvanic rectifier power source；Described asymmetrical half-bridge power conversion circuit is by connecting booster circuit and electricity The power switch parts composition of motivation winding；Increase between DC source and asymmetrical half-bridge power conversion circuit and rise piezoelectricity Road, booster circuit includes electric capacity C₁、C₂, switch transistor T₁, diode D₁, switch transistor T₂, diode D₂₁、D₂₂、D₂₃、D₂₄, switching tube T₃, diode D₃.Wherein electric capacity C₁It is connected in parallel on unidirectional current source；Switch transistor T₃Anti-paralleled diode D₃After, D₃Negative pole and liter piezoelectricity Hold C₂Series connection is connected in parallel on asymmetrical half-bridge power circuit both sides, D again₃Positive pole and C₁Low-pressure side connects；Switch transistor T₂And diode D₂₁、D₂₂、D₂₃、D₂₄Constitute two-way switch, connect electric capacity C respectively₁High-pressure side and electric capacity C₂Low-pressure side；Switch transistor T₁Inverse parallel Diode D₁After, D₁Positive pole and C₁High-pressure side be connected, D₁Negative pole and C₂High-pressure side be connected.

Many level power topological structure of described a kind of switched reluctance machines is by controlling booster circuit and asymmetric half The conducting of the switching tube in bridge power conversion circuit and shutoff, make switched reluctance machines switchover operation under many level states.

Booster circuit and asymmetrical half-bridge power conversion in many level power topological structure of described switched reluctance machines Device for power switching in device all uses full control property device.

This utility model electric capacity C₁Both sides voltage is equal to DC side supply voltage, by controlling switch transistor T before starting motor₃ Break-make can give electric capacity C₂Charging, the voltage loaded when electric motor starting is electric capacity C₁And C₂Superimposed voltage (U_C1+U_C2), electricity Machine can quickly start.Contrast traditional switched reluctance machines asymmetrical half-bridge power conversion circuit, described in the utility model Many level power topological structure of switched reluctance machines, by controlling in booster circuit and asymmetrical half-bridge power conversion circuit The break-make of switching tube, can make motor be operated in high-speed excitation (+2), quickly demagnetization (-2), normal excitation (+1), normally demagnetize (0) five kind of state of (-1) and afterflow.This utility model achieves switched reluctance machines and quickly starts, and solves in motor operation Exciting current rises, declines slowly, system effectiveness and the problem such as dynamic property is low, be one have high robust, high reliability, Intelligentized structure.

Accompanying drawing explanation

Fig. 1 is many level power topological structure of switched reluctance machines described in the utility model.

Fig. 2 is the electric capacity charging figure of power topology described in the utility model.

Fig. 3 is the operational mode figure of power topology described in the utility model, and as a example by A phase, Fig. 3 (a) is high-speed excitation Pattern；Fig. 3 (b) is normal excitation mode；Fig. 3 (c) is freewheeling mode；Fig. 3 (d) is pattern of normally demagnetizing；Fig. 3 (e) is quick Demagnetization pattern.

In figure: T_A1、T_A2: motor A phase winding switching tube；

D_A1、D_A2: motor A phase winding fly-wheel diode；

T_B1、T_B2: motor B phase winding switching tube；

D_B1、D_B2: motor B phase winding fly-wheel diode；

T_C1、T_C2: motor C phase winding switching tube；

D_C1、D_C2: motor C phase winding fly-wheel diode；

Detailed description of the invention

This utility model provides many level power topological structure of a kind of switched reluctance machines, below in conjunction with the accompanying drawings to this Utility model is further explained.

As it is shown in figure 1, this utility model provides many level power topological structure of a kind of switched reluctance machines, including straight Stream power supply, a booster circuit and an asymmetrical half-bridge power conversion circuit.Wherein DC source is to be become by AC rectification Galvanic rectifier power source；Asymmetrical half-bridge power conversion circuit is by the power switch portion connecting booster circuit and motor winding Part forms；Increasing booster circuit between DC source and asymmetrical half-bridge power conversion circuit, booster circuit includes electric capacity C₁、 C₂, switch transistor T₁, diode D₁, switch transistor T₂, diode D₂₁、D₂₂、D₂₃、D₂₄, switch transistor T₃, diode D₃.Wherein electric capacity C₁And It is associated in unidirectional current source；Switch transistor T₃Anti-paralleled diode D₃After, D₃Negative pole and boost capacitor C₂Series connection is connected in parallel on asymmetric half again Bridge power circuit both sides, D₃Positive pole and C₁Low-pressure side connects；Switch transistor T₂With diode D₂₁、D₂₂、D₂₃、D₂₄Constitute two-way switch, Connect electric capacity C respectively₁High-pressure side and electric capacity C₂Low-pressure side；Switch transistor T₁Anti-paralleled diode D₁After, D₁Positive pole and C₁Height Pressure side is connected, D₁Negative pole and C₂High-pressure side be connected.

As in figure 2 it is shown, be the charge mode of many level power topological structure of switched reluctance machines, electric capacity C₁Both sides electricity Pressure, equal to DC side supply voltage, turns on T₃DC side power supply is to electric capacity C₂Charging.

It is high-speed excitation pattern as shown in Fig. 3 (a), switch transistor T₂、T_A1、T_A2Conducting, and T₁、T₃Turn off, diode D_A1、D_A2 Cut-off, voltage U_C1+U_C2Adding to A phase winding two ends, current direction is as it can be seen, make motor winding high-speed excitation.Such as Fig. 3 (b) institute Show it is normal excitation mode: switch transistor T_A1、T_A2Conducting, and T₁、T₂、T₃Turn off, diode D_A1、D_A2Cut-off, voltage U_C1Add to A Phase winding two ends, current direction is as it can be seen, make the normal excitation of motor winding.As shown in Fig. 3 (c), it is freewheeling mode: for A Phase, if only turn on switch transistor T in running_A2Or only turn on switch transistor T_A1, now winding both end voltage is 0, and A phase enters Freewheeling mode, current direction is as shown in the figure.Normally demagnetize as shown in Fig. 3 (d) pattern: switch transistor T₁Conducting, and T₂、T₃、T_A1、T_A2 Turn off, diode D_A1、D_A2Conducting, voltage-U_C1Adding to A phase winding two ends, current direction is as it can be seen, winding realizes normally moving back Magnetic.Quickly demagnetize as shown in Fig. 3 (e) pattern: switch transistor T₂Conducting, and T₁、T₃、T_A1、T_A2Turn off, diode D_A1、D_A2Conducting, electricity Pressure-(U_C1+U_C2) adding to A phase winding two ends, current direction is as it can be seen, winding realizes quickly demagnetization.

Schematically being described this utility model and embodiment thereof above, this description does not has limitation, accompanying drawing Shown in be also one of embodiment of the present utility model.If so those of ordinary skill in the art is enlightened by it, In the case of creating objective without departing from this utility model, the same item taken other form or each parts cloth of other form Office's mode, designs the technical scheme similar to this technical scheme and embodiment without creative, all should belong to this practicality new The protection domain of type.

Claims (1)

1. many level power topological structure of switched reluctance machines, including DC source, booster circuit and asymmetrical half-bridge Power conversion circuit, it is characterised in that:

Described DC source is that AC rectification becomes galvanic rectifier power source；

Described asymmetrical half-bridge power conversion circuit is to connect booster circuit and the power switch parts of motor winding；

Described booster circuit includes electric capacity C₁、C₂, switch transistor T₁, diode D₁, switch transistor T₂, diode D₂₁、D₂₂、D₂₃、D₂₄、 Switch transistor T₃, diode D₃, wherein electric capacity C₁It is connected in parallel on unidirectional current source；Switch transistor T₃Anti-paralleled diode D₃After, D₃Negative pole with Boost capacitor C₂Series connection is connected in parallel on asymmetrical half-bridge power circuit both sides, D again₃Positive pole and C₁Low-pressure side connects；D₂₁Positive pole and D₂₄ Negative pole is connected, D₂₁Negative pole and D₂₂Negative pole is connected, D₂₂Positive pole and D₂₃Negative pole is connected, D₂₃Positive pole and D₂₄Positive pole is connected, switch transistor T₂ Colelctor electrode and diode D₂₁And D₂₂Negative pole is connected, switch transistor T₂Emitter stage and diode D₂₃And D₂₄Positive pole is connected, switch transistor T₂With Diode D₂₁、D₂₂、D₂₃、D₂₄After constituting two-way switch, D₂₁Positive pole and electric capacity C₁High-pressure side be connected, D₂₂Positive pole and electric capacity C₂'s Low-pressure side is connected；Switch transistor T₁Anti-paralleled diode D₁After, D₁Positive pole and C₁High-pressure side be connected, D₁Negative pole and C₂High-pressure side It is connected.