Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Excitation of switch magnetic resistance motor

A reluctance motor and multi-phase switch technology, applied in the direction of AC motor control, electronic commutation motor control, single motor speed/torque control, etc., can solve problems such as not suitable for driving devices

Inactive Publication Date: 2003-01-08
NIDEC SR DRIVES
View PDF1 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because of the peak current requirements, these systems are not suitable for use with drives in which two phases are conducted simultaneously

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Excitation of switch magnetic resistance motor
  • Excitation of switch magnetic resistance motor
  • Excitation of switch magnetic resistance motor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0034] The present invention is implemented in a preferred embodiment in a transmission system such as that shown in FIG. 1 with a commutation circuit for each phase shown in FIG. 2 . According to the invention, by programming the controller 14, the control strategy is adapted to develop the idle configuration of the conversion circuit.

[0035] Figure 6 A typical rotor position sensor (rpt) of the three-phase four-pole drive in Fig. 1 is schematically shown in . Three sensors are shown arranged mechanically offset by an angle of 120°, but any offset arrangement equal to an electrical angle of 120° may be used. This schematic has teeth with unit void ratio. In practice, this can be varied slightly to accommodate any non-ideal characteristics of the sensor, such as the beam width of an optical sensor or the fringing flux of a Hall effect sensor, so that the final signal of the rpt is at or acceptably close to a mark-to-space ratio of 1 .

[0036] Figure 6 The output of the...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

A switched reluctance drive is supplied from a power source. The phases of the machine are controlled by a current chopping controller which uses an excitation strategy to minimise the supply current drawn for a particular output. The strategy is to allow an out-going phase to freewheel as long as it produces positive torque while the incoming phase is excited.

Description

technical field [0001] This invention relates to the excitation of switched reluctance motors. In particular, the invention relates to excitation that minimizes the supply current used for a particular output. Background technique [0002] The properties and operation of switched reluctance systems are well known in the prior art and are described, for example, in Stephenson and Blake, "Switched reluctance motors and their drives", PCIM'93, Nürnberg, June 21-24, 1993 characteristics, design, and applications", which is hereby incorporated by reference. FIG. 1 schematically shows a typical switched reluctance drive, where a switched reluctance motor 12 drives a load 19 . The input DC power source 11 may be a battery or a rectified and filtered AC mains. Under the control of the electronic control unit 14 , the DC voltage provided by the power source 11 is converted by the power converter 13 on the phase winding 16 of the motor 12 . For proper operation of the drive, this ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): H02P25/08
CPCH02P25/085H02P25/092H02P25/08
Inventor 查尔斯·R·埃略特伊恩·乔迪森
Owner NIDEC SR DRIVES
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products