Abstract: An infant swing rocking chair includes a frame, two rocking bars and a chair assembly. The two front legs are arc posts protruding forward; the front legs and rear legs are hinged through the leg joint, and the front legs and the rear legs have two working positions of unfolding & supporting and folding; the rocking bar has the working position of rocking and the working position of locating; the bottom of each rocking bar is hinged with the chair assembly through the chair joint to make the chair assembly have the working position for the swing and the working position for the rocking chair; and the infant swing rocking chair has two use modes: a swing and a rocking chair.

Abstract: Disclosed is a swinging drive control apparatus, including a controller and a motor, where the controller detects a counter-electromotive force of the motor and drives the motor according to the detection result. Also disclosed is a corresponding method, including: measuring a counter-electromotive force of a motor in a previous cycle; and comparing a maximum counter-electromotive force value with a preset value, and calculating a PWM pulse duty factor in a next cycle. By directly detecting the counter-electromotive force of the motor without using a sensor, the present invention implements swinging frequency and phase tracking as well as swinging amplitude control, and simplifies a control system.

Abstract: An infant swing rocking chair includes a frame, two rocking bars and a chair assembly. The two front legs are arc posts protruding forward; the front legs and rear legs are hinged through the leg joint, and the front legs and the rear legs have two working positions of unfolding & supporting and folding; the rocking bar has the working position of rocking and the working position of locating; the bottom of each rocking bar is hinged with the chair assembly through the chair joint to make the chair assembly have the working position for the swing and the working position for the rocking chair; and the infant swing rocking chair has two use modes: a swing and a rocking chair.

Abstract: Disclosed is a swinging drive control apparatus, including a controller and a motor, where the controller detects a counter-electromotive force of the motor and drives the motor according to the detection result. Also disclosed is a corresponding method, including: measuring a counter-electromotive force of a motor in a previous cycle; and comparing a maximum counter-electromotive force value with a preset value, and calculating a PWM pulse duty factor in a next cycle. By directly detecting the counter-electromotive force of the motor without using a sensor, the present invention implements swinging frequency and phase tracking as well as swinging amplitude control, and simplifies a control system.