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Actuation method for three-phase current machine and actuation device

A technology of three-phase AC and trigger mode, which is applied in the direction of AC motor control, electrical components, control systems, etc., can solve the problems that the motor cannot be triggered or has limited triggering, and achieves the effect of control

Active Publication Date: 2014-04-16
ROBERT BOSCH GMBH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In summary, with the known triggering methods implemented by means of pulse width modulation, it is disadvantageous for higher rotational speeds and correspondingly high electrical frequencies and for higher required power or higher The motor cannot be activated with respect to the required torque or can only be activated to a limited extent in terms of energy efficiency

Method used

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  • Actuation method for three-phase current machine and actuation device
  • Actuation method for three-phase current machine and actuation device
  • Actuation method for three-phase current machine and actuation device

Examples

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Embodiment Construction

[0039] exist figure 1 An inverter for activating the electric machine is shown schematically in , and is generally designated by the reference numeral 10 .

[0040]The inverter 10 is connected to a DC power source 12 and is used to energize an electrical three-phase AC motor 14 in three phases. The inverter 10 has three half-bridges 16 , 18 , 20 which are connected in parallel to the DC source 12 and each have two switches S. Between the switches S, a half-bridge tap 22 is formed in each case, which is connected to a phase conductor of the electric machine 14 in each case.

[0041] By alternately opening and closing the switches S, trigger voltages UU, UV, UW are respectively applied between the phase conductors, so that corresponding phase currents IU, IV, IW respectively occur, which drive the phase currents Described motor 14.

[0042] The inverter 10 is preferably formed with the aid of semiconductor switches S, wherein a free-wheeling diode (not shown here) is generall...

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PUM

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Abstract

The present invention relates to a method for actuating an electric three-phase current machine, in particular a synchronous machine (14), which is supplied with current by means of an inverter, the inverter having a plurality of circuit breakers that are provided to supply the electric machine with electricity in multiphase manner, it being possible to actuate the inverter in different actuation modes (I, II, III, IV, V), the actuation modes (I, II, III, IV, V) being formed by space vector modulation (I), overmodulation (II, III, IV) or block commutation (V), and the corresponding actuation mode (I-V) being selected according to a rotational speed (n) or an electric frequency (FEL) of the three-phase current machine and according to a power or torque requirement.

Description

technical field [0001] The invention relates to a method for triggering an electrical three-phase AC motor, in particular a synchronous motor, powered by means of an inverter, wherein the inverter has a plurality of power switches, which are configured to The electrical three-phase alternating current machine is supplied with current in polyphase, and the inverter can be activated in different activation modes. [0002] Furthermore, the invention relates to a device for activating an electrical three-phase AC motor, in particular a synchronous motor, which device has an inverter with a plurality of semiconductor switches for polyphase switching The electrical three-phase alternating current motor is supplied with current; and the device has a control unit for triggering the inverter. [0003] Finally, the invention relates to a motor vehicle drive train having at least one electrical three-phase alternating current electric machine for supplying drive power and for actuating ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P27/08
CPCH02P27/08H02P27/085
Inventor W.胡T.默克尔
Owner ROBERT BOSCH GMBH
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