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Drive circuit for a synchronous electric motor

A drive circuit and synchronous motor technology, which is applied to the starter of a single synchronous machine, motor generator/starter, AC motor control, etc., and can solve problems such as rotor magnet demagnetization

Inactive Publication Date: 2009-09-09
EMERSON APPLIANCE MOTORS EURO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the other hand, the current supplied to the stator winding does not have to be at a particularly high level, as this would entail the risk of demagnetizing the rotor magnets

Method used

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  • Drive circuit for a synchronous electric motor
  • Drive circuit for a synchronous electric motor
  • Drive circuit for a synchronous electric motor

Examples

Experimental program
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Embodiment Construction

[0024] exist figure 2 In , numeral 10 denotes the entire drive circuit for the above-mentioned type of synchronous motor. The circuit 10 comprises two power supply terminals N, P designed to be connected to an alternating current power supply, such as a common 50 (60) Hz power supply.

[0025] In the embodiment shown by way of example, the drive circuit 10 comprises a triac 11 connected in series with the stator winding 4 between the supply terminals N, P.

[0026] The drive circuit 10 also comprises first and second controllable unidirectional electronic switching devices, denoted by 12 and 13 , connected in antiparallel to each other between the supply terminal N and the intermediate terminal or tap 4c of the stator winding 4 .

[0027] For example, devices 12 and 13 are SCRs and have control (gate) inputs indicated by 12a and 13a respectively.

[0028] exist figure 2 In , numeral 14 denotes the entire processing and control circuit, which has two input terminals connec...

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PUM

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Abstract

The drive circuit (10) comprises: a processing and control circuit (14) including a protection circuit (16) designed to generate at its output a logic inhibit signal (C) derived from the motor supply voltage ( Beginning at each zero crossing of V), the inhibit signal (C) has a predetermined duration (t 0 ); and an activation circuit (17) connected to the rotor's position sensor (6) designed to activate the first and second controllable conduction devices (12, 13) associated with the stator winding (4), The current is alternately conducted synchronously with the signal (H) provided by the position sensor (6). The activation circuit (17) is connected to the protection circuit (16) in such a way that the conduction of the current through the controllable conduction device (12, 13) activated at any time, at the time of the prohibition signal (C) Duration (t 0 )Prohibited.

Description

technical field [0001] The present invention generally relates to drive circuits for synchronous electric machines. [0002] In particular, the invention relates to a drive circuit for a synchronous motor powered by a voltage provided by an alternating current source, the synchronous motor comprising: [0003] a stator with at least one winding, and [0004] A permanent magnet rotor is associated with the position sensor arrangement to provide an electrical signal in substantially square wave form. [0005] More particularly, the present invention relates to a driving circuit, comprising: [0006] means for controlling the conduction of current substantially connected in series with at least a portion of the stator winding between the terminals of the aforementioned power supply and comprising first and second controllable unidirectional conduction electronics connected in antiparallel to each other with respective control inputs equipment; and [0007] Processing and cont...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P1/46H02P25/02
CPCH02P1/46H02P25/021H02P25/024H02P7/06
Inventor S·阿奎威瓦D·迪阿科诺
Owner EMERSON APPLIANCE MOTORS EURO