65results about How to "Control heating power" patented technology

Provided is an induction heating cooker which prevents overheating of a pan whose bottom is warped to protrude and a pan having a thick bottom. The induction heating cooker is provided with a heatingcoil (2) for inductively heating a cooking container; an inverter circuit (7) for supplying the heating coil with a high frequency current; an infrared sensor (3) for detecting an infrared ray radiated from the cooking container; a power integrating section (81) for integrating a heating power outputted from the inverter circuit; and a heat control section (82) for controlling output from the inverter circuit. When the integration value obtained by the power integrating section is less than a prescribed value when an output increase quantity of the infrared sensor reaches a first prescribed value after heating is started with a first heating power, heat control mode is shifted to first heat control mode. When the integration value obtained at the power integrating section is at a prescribed value or higher, the heat control mode is shifted to second heat control mode. In the first heat control mode, the heating power is suppressed to a second heating power, which is lower than the first heating power. In the second heat control mode, heating is performed with a third heating power which is higher than the second heating power.

The device has a filter element (32) arranged in a filter housing (28). A heater is provided for heating up medium flowing through the filter element, and a water sensor (50) is provided for detecting water collected in the filter housing. The heater is designed together with a water sensor as a structural unit. A central control device (16) is arranged in the filter housing for controlling a structural unit and heating performance of the heater and evaluating water level in the water sensor. An independent claim is also included for a method for operating a filter device.

A control method for a PTC electric heater of an electric vehicle, comprising the following steps: detecting working currents of a PTC electric heater; sampling the working currents to obtain current sampling values, and performing integral calculation on the current sampling value of each sampling period to obtain calculated power of the PTC electric heater; determining, within each switching period of a power switching transistor, whether the calculated power reaches target power of the PTC electric heater; if the calculated power reaches the target power of the PTC electric heater, controlling the PTC electric heater to stop heating by controlling the power switching transistor so that the heating amount of the PTC electric heater within each switching period keeps consistent with the heating amount corresponding to the target power. Also disclosed are a control system for a PTC electric heater of an electric vehicle, and an electric vehicle.

The invention provides a motor heating control method, controller and system based on table look-up and closed-loop control, belonging to the field of motor control. The motor heating control method includes: obtaining in real time the direct-axis current increment corresponding to the closed-loop control mode according to the target heating power and actual heating power of the motor; querying the pre-calibrated Table 1 according to the target torque and actual speed of the motor to obtain the corresponding direct axis current look-up table value; obtain the target direct axis current of the motor according to the direct axis current increment and the direct axis current look-up table value; query the pre-calibrated value according to the target direct axis current and the target torque Table 2 obtains the corresponding target quadrature axis current, so as to pass current to the motor according to the target direct axis current and the target quadrature axis current. The motor heating control method of the invention can realize the continuous control of the heating power of the motor and the simultaneous control of the heating power and torque of the motor.