Control system of electric machine for dynamic changing wavecurve of electric machine energized current
A technology of motor control and current waveform, applied in control system, AC motor control, single motor speed/torque control, etc., can solve problems such as battery current consumption
Inactive Publication Date: 2005-08-24
WAVECREST LAB LLC
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Problems solved by technology
When high torque demand conditions decrease, a return to the high efficiency curve may be delayed until the user recognizes that the high torque curve is no longer required, thus drawing unnecessary current from the battery
Method used
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[0024] The present invention is applicable to electric machines such as those disclosed in co-pending application 09 / 826,422, although the present invention can be used with a variety of other electric machines including permanent magnet electric machines. therefore figure 1is an exemplary diagram showing rotor and stator elements as described in that application, the disclosure of which is incorporated herein. The rotor part 20 is an annular ring structure with permanent magnets 21 distributed substantially uniformly along a cylindrical support plate 25 . The permanent magnets are rotor poles that alternate in polarity along the inner circumference of the annular ring. The rotor surrounds a stator part 30 which is separated by an annular radial air gap. The stator 30 includes a plurality of electromagnet core sections of identical construction, which are evenly distributed along the air gap. Each core portion comprises a generally U-shaped magnet structure 36 forming two p...
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A control system is provided for a multiphase motor having a plurality of stator phase components, each stator phase component comprising a phase winding formed on a core element, and a rotor. A plurality of motor control schemes are stored in memory or calculated dynamically during motor operation. Subject to user or system selection, one of the motor control schemes is selected by a controller for implementation. The controller generates control signals that are applied to energization circuitry for supplying current to the phase windings with a particular current waveform profile in accordance with the selected motor control scheme. The controller has an input terminal for receiving a user initiated torque command signal representing a desired motor torque. Each motor control scheme provides motor driving current that corresponds to torque command signals received at the controller input terminal. In an automatic mode, the controller accesses the appropriate control scheme to meet the torque tracking requirements of the system.
Description
[0001] related application [0002] This application contains subject matter related to co-pending U.S. Application No. 09 / 826,423 filed April 5, 2001 by Maslov et al., co-pending U.S. Application No. 09 / 826,422, U.S. Application No. 09 / 966,102, filed October 1, 2001 by Maslov et al., U.S. Application No. 09 / 993,596, filed November 27, 2001 by Pyntikov et al., Maslov et al., 2002 US Application No. 10 / 173,610, filed June 19, and US Application No. 10 / 290,537, filed November 8, 2002, by Maslov et al., all of which are commonly assigned with the present application. The disclosures of these applications are hereby incorporated by reference. field of invention [0003] The present invention relates to the control of electric motors, and more particularly to the independent implementation of multiple motor control schemes for influencing the relative stator current waveform profiles. Background of the invention [0004] The co-pending patent applications identified above descr...
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IPC IPC(8): H02P6/08H02P25/02H02P27/06
CPCH02P27/06H02P25/021
Inventor 博里斯·A·马斯洛夫马修·菲姆斯特袁国辉
Owner WAVECREST LAB LLC