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Three-phase AC motor trigger method and trigger device

A three-phase AC and phase voltage technology is applied in the triggering device of synchronous motor, motor vehicle power train, and synchronous motor triggering field.

Active Publication Date: 2017-05-24
ROBERT BOSCH GMBH
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  • Summary
  • 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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  • Three-phase AC motor trigger method and trigger device
  • Three-phase AC motor trigger method and trigger device

Examples

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Embodiment Construction

[0039] in figure 1 An inverter for triggering the motor is schematically shown in, and the inverter is generally represented by reference numeral 10.

[0040] The inverter 10 is connected to a DC power supply 12 and is used to energize a three-phase AC motor 14 in three phases. The inverter 10 has three half bridges 16, 18, 20, which are connected in parallel with the DC power supply 12 and each have two switches S. A half-bridge tap 22 is respectively formed between the switches S, and the half-bridge taps are respectively connected to the phase conductors of the electric machine 14.

[0041] Through the alternate opening and closing of the switch S, trigger voltages UU, UV, UW are loaded between the phase conductors, so that the phase currents IU, IV, IW appear respectively, and the phase currents drive all the phase conductors. 述motor 14.

[0042] The inverter 10 is preferably formed by means of a semiconductor switch S, wherein a free-wheeling diode, which is generally not shown...

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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 present invention relates to a method for triggering an electrical three-phase AC motor, especially a synchronous motor, which is energized by means of an inverter, wherein the inverter has a plurality of power switches, and the power switches are configured to The electric three-phase AC motor is supplied with current in multiple phases, and the inverter can be triggered in different trigger modes. [0002] In addition, the present invention relates to a device for triggering an electrical three-phase AC motor, especially a synchronous motor. The device has an inverter, and the inverter has a plurality of semiconductor switches for multi-phase grounding. Supply current to the electrical three-phase AC motor; and the device has a control unit for triggering the inverter. [0003] Finally, the present invention relates to a motor vehicle power train having at least one electrical three-phase AC motor for providing driving power, and having a motor for trig...

Claims

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Application Information

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