Motor Drive Control for Electronic Steering Lock

The patent applies periodic pulse-width modulation (PWM) to control the motor. Instead of continuous full voltage switching, the motor is supplied with periodic pulses whose duty cycle is adjusted according to the movement phase. This periodic action reduces average power consumption while maintaining the ability to generate required forces when needed.

The patent dynamically adjusts the duty cycle of the PWM signal based on the real-time movement state of the locking pin. During phases requiring high force (such as initial engagement), the duty cycle is increased; during easier movement phases, it is reduced. This dynamic adaptation optimizes the balance between force output and energy consumption.

By using periodic PWM control instead of continuous full-power switching, the motor operates more smoothly with reduced vibration and noise. The high-frequency pulsing allows the motor to maintain average torque while reducing mechanical shocks and audible noise from the motor and gearbox.

The patent changes the electrical parameter (duty cycle of PWM signal) to control motor behavior. By adjusting this parameter based on movement phase, the system optimizes both force generation and noise reduction, avoiding the noisy full-switching operation while maintaining adequate motor force.

The patent introduces dynamic control through PWM while maintaining relatively simple switching device architecture. The switching devices still operate in binary on/off states, but the timing and duration (duty cycle) of these states are dynamically adjusted to regulate current, achieving energy control without fundamentally complicating the switching hardware.

The patent controls current regulation by changing the temporal parameter (duty cycle) of the switching signal rather than changing the switching devices themselves. This approach maintains device simplicity while achieving sophisticated current control through parameter modulation.