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Torque-based electrical pulse width modulation control system for switched reluctance motors

A switched reluctance, motor technology, applied in the field of motors, can solve problems such as affecting the torque generation of switched reluctance motors

Inactive Publication Date: 2016-05-04
SHOP VAC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Modifications to rotor pole faces are known to affect torque production in switched reluctance motors

Method used

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  • Torque-based electrical pulse width modulation control system for switched reluctance motors
  • Torque-based electrical pulse width modulation control system for switched reluctance motors
  • Torque-based electrical pulse width modulation control system for switched reluctance motors

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0034] refer to figure 1 and figure 2 Thus, switched reluctance motor 10 may be constructed as a package or unit of subassemblies, each of which may be preassembled individually and brought together during the manufacturing process. Specifically, the motor 10 may include an upper housing unit 12 , a lower housing unit 13 , a stator 14 , a rotor 16 , a drive assembly 18 , a first end cover 20 and a second end cover 22 . The upper case unit 12 and the lower case unit 13 may be annular in shape, the first end cap 20 is connected to the upper case unit 12 , and the second end cap 22 is connected to the lower case unit 13 . Such as figure 1 and figure 2 As shown, each of the upper housing unit 12 , lower housing unit 13 , stator 14 , rotor 16 , drive assembly 18 , first end cap 20 and second end cap 22 may be combined into a single package or unit.

[0035] The upper housing unit 12 may include a plurality of holes 24 for receiving a plurality of fasteners 26 to secure the up...

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PUM

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Abstract

Methods and systems of accelerating a brushless, DC electric motor based on torque may include determining a slope based on a maximum torque of the BLDC motor at a lower operating load and a maximum torque of the motor at a higher operating load, determining a period of the rotor based on sensor signals, and determining and applying a phase advance to a PWM pulse for a subsequent revolution of the rotor based on the period and the slope. In some embodiments, the amount of the phase advance is further based on maximum load optimum advance and / or maximum load speed. In some embodiments, a phase dwell is determined based on a positive torque zone and applied to the PWM pulse. In some embodiments, when the motor is operating below a given threshold, fixed-width PWM pulses are applied to subsequent revolutions of the rotor instead of phase-advanced PWM pulses.

Description

technical field [0001] The present disclosure relates generally to electric motors and, more particularly, to controlling pulse width modulated pulses for accelerating electric motors. Background technique [0002] A switched reluctance motor is an electric motor that includes a rotor and a stator. The torque of a reluctance motor is produced by the tendency of the rotor to move to a position relative to the stator where the reluctance of the magnetic circuit is minimized, ie the inductance of the energized stator winding is maximized. In a switched reluctance motor, circuitry is provided to detect the angular position of the rotor and to sequentially energize the phases of the stator windings according to the rotor position. [0003] A switched reluctance motor is a doubly salient motor with poles on both the stator and rotor, and has windings on the stator poles only. The rotor of a switched reluctance motor does not include a commutator or windings. In some cases, the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P6/14H02P25/092
CPCH02P25/0925H02P6/153
Inventor 尼尔·N·诺雷尔
Owner SHOP VAC