Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for controlling electric motor with pulse width modulation signal

A technology of pulse width modulation signal and pulse width modulation, which is applied in motor control, AC motor control, single motor speed/torque control, etc.

Pending Publication Date: 2022-05-27
海拉有限双合股份公司
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The method disclosed in document WO 2013 / 068087 has the disadvantage that the carrier frequency of the radio transmitter set on the radio must be known when avoiding interference
In addition, only one signal can be considered in anti-interference

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
  • Method for controlling electric motor with pulse width modulation signal
  • Method for controlling electric motor with pulse width modulation signal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0026] The method according to the invention begins with steps for preparing the motor to start, in which steps certain settings are determined. These settings can be recalled from memory as standard settings. The values ​​determined in this way may be the starting value Default_f=20 kHz and the time time_step_size=0.5 ms for the pulse width modulation frequency Freq_Dyn after which a change to the pulse width modulation frequency Freq_Dyn should be made. In addition, the value Freq_step_size can be set, and the PWM frequency Freq_Dyn can change this value. In this way, it is also possible to determine the lower limit Freq_Min and the upper limit Freq_Max of the frequency band within which the pulse width modulation frequency Freq_Dyn should lie.

[0027] After entering the process R for changing the PWM frequency Freq_Dyn (see Figure 1a ), the counter Step_count=1, the clock Timer=0 and the flag Var_up=1 are initialized. In counter Step_count: how many times the PWM frequ...

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

The invention relates to a method for controlling an electric motor with a pulse-width-modulated signal, the pulse-width-modulated signal being a rectangular pulse sequence consisting of successive pulses, the pulse duration of which is adjustable, whereby the duty ratio is variable, the duty ratio being the ratio of the pulse duration to the period of the rectangular pulse sequence, the reciprocal of the rectangular pulse sequence period is a pulse width modulation frequency at which the pulses are consecutive to one another, the pulse width modulation frequency being varied within a frequency band, without changing the duty cycle, repeatedly and according to a predetermined pattern or randomly during operation of the electric motor.

Description

technical field [0001] The invention relates to a method for driving an electric motor with a pulse width modulated signal, wherein the pulse width modulated signal is a rectangular pulse sequence consisting of successive pulses, the pulse duration of which is adjustable. By setting the pulse duration, the so-called duty cycle can be set, which is the ratio of the pulse duration to the length of the rectangular pulse sequence, the so-called cycle duration. The inverse of the period duration is the pulse width modulation (PWM) frequency at which the pulses follow each other. Background technique [0002] Pulse-width-controlled electric motors are used in almost all areas of electric drive technology. In motor vehicles, motors such as fan motors and electrical regulation systems are often electric motors. The drive of the pulse-width-controlled electric motor is carried out here via a control device, which generates a rectangular pulse sequence, the duty cycle of which is se...

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
Patent Type & Authority Applications(China)
IPC IPC(8): H02P27/08H02P6/08H02P6/20H02P6/24
CPCH02P27/085H02P6/08H02P6/20H02P6/24H02P7/29H02P29/50
Inventor M·菲伊斯廷J·施姆林
Owner 海拉有限双合股份公司