Spectrum Spread for Electric Motors
A technology of electric motors and circuits, applied in the field of spectrum expansion for electric motors, can solve the problems of introducing acoustic burrs
Active Publication Date: 2022-05-31
VALEO SYST THERMIQUES
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- Abstract
- Description
- Claims
- Application Information
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Problems solved by technology
However, this technique is prone to introducing acoustic glitches at frequencies of the audible spectrum, which typically extend from 20Hz to 20kHz (even though humans perceive the entirety of this spectrum as an exception)
Method used
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no. 6 example
[0078] The electrical control signal includes a series of pulse trains.
[0079] Each pulse of the series of pulse trains is defined by its width and period.
[0080] The ratio of the pulse width to the pulse period defines the average electrical power supplied to the motor by the pulse.
[0081] All pulse trains of the pulse train series include the same number of pulses.
[0085] The features of the first to seventh embodiments regarding the control method of the electric motor can be converted into those according to the eighth embodiment
[0087] According to the tenth embodiment, a computer-readable non-transitory storage medium stores the computer according to the ninth embodiment
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In particular, the invention relates to a method for controlling an electric motor, comprising generating, by means of an electronic control circuit, electrical signals for controlling the electric motor. The purpose of the generated signal is to reduce electromagnetic parasitics in the AM radio frequency band as well as in the frequency band [0kHz; 125kHz] (used in particular by RFID chips associated with certain sensors), while not creating acoustical parasitics in the audible frequency band .
Description
Spectrum Spreading for Electric Motors technical field [0001] The subject matter of this specification is, in particular, a method of controlling an electric motor, particularly a brushless electric motor. This especially requires a A brushless motor for a motor vehicle to propel the fan of the vehicle's cabin, the motor is usually a permanent magnet synchronous electric motors, and are usually three-phase. Background technique In brushed motors, the rotating collector ensures the required commutation. Brushes can cause maintenance and performance issues, so brushless motors are designed. [0003] Driving a brushless motor (also known as an electronically commutated motor) involves electrical Sub-control system to ensure the commutation of the current in the windings (coils). Electronic control systems typically include electrical signal generators. Purpose These electrical signals in delivering power to the motor are usually pulse width modulated (PWM for "pul...
Claims
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IPC IPC(8): H03K7/08H02M1/44H02P29/10
CPCH02M1/44H02M1/14H02P21/26H03K7/08H02P21/22
Inventor P.布尔德尔X.古梅因J.福尼尔S.格兰德约特
Owner VALEO SYST THERMIQUES