초록 ▼

High speed fast response PWM current control regulation methodology and circuitry samples the required peak motor current value from a previous PWM cycle and calculates the required peak motor current value for the present PWM cycle and repeats the sampling and calculating every PWM cycle and update

High speed fast response PWM current control regulation methodology and circuitry samples the required peak motor current value from a previous PWM cycle and calculates the required peak motor current value for the present PWM cycle and repeats the sampling and calculating every PWM cycle and updates the new required peak motor current value every PWM cycle. The required peak motor current value for the present PWM cycle is calculated according to the equation I(peak present)=I(command)+0.5I(peak last)-0.5I(turn-on), where I(peak present) is the required peak motor current value for the present PWM cycle, I(command) is the commanded motor current value, I(peak last) is the previous required peak motor current value from the immediately preceeding PWM cycle, and I(turn-on) is the turn-on motor current value.

대표청구항 ▼

A control method for an electric motor comprising energizing said motor through pulse width modulated switch means to apply energization voltage to said motor in an on condition of said switch means until motor current reaches a given peak value, and then turning off said switch means such that moto

A control method for an electric motor comprising energizing said motor through pulse width modulated switch means to apply energization voltage to said motor in an on condition of said switch means until motor current reaches a given peak value, and then turning off said switch means such that motor current decreases, and then turning said switch means back on until motor current again increases to said peak value, and then turning off said switch means, and so on, to regulate motor current, each pair of on and off conditions of said switch means constituting a PWM cycle, sampling the required peak motor current value from a previous PWM cycle, I(peak last), sampling motor current value at turn-on of said switch means, I(turn-on), and calculating the required peak motor current value for the present PWM cycle, I(peak present), from both I(peak last) and I(turn-on), to provide high speed fast response PWM current control regulation.