Abstract: An energy conversion device is provided. The energy conversion device includes a reversible pulse-width modulation (PWM) rectifier (102) and a motor coil (103). The motor coil (103) includes L sets of winding units, and each set of winding unit is connected with the reversible PWM rectifier (102), where L?2 and is a positive integer. At least two sets of heating circuits of a to-be-heated device are formed by an external power supply (100), the reversible PWM rectifier (102), and the winding units in the motor coil (103). The energy conversion device controls the reversible PWM rectifier (102) according to a control signal, so that a current outputted from the external power supply (100) flows through at least two sets of winding units in the motor coil (103) to generate heat.

Abstract: Disclosed are a method, apparatus, system and terminal device for measuring the total radiated power of an array antenna, and a non-transitory computer-readable storage medium. The method includes: dividing an array antenna to be measured into N antenna sub-arrays, the N being greater than or equal to 2; determining a sampling interval according to the sizes of the N antenna sub-arrays; determining sampling points according to the sampling interval; and determining the total radiated power of the entire array antenna according to the equivalent isotropic radiated power of the sampling points.

Abstract: Disclosed are a method, apparatus, system and terminal device for measuring the total radiated power of an array antenna, and a non-transitory computer-readable storage medium. The method includes: dividing an array antenna to be measured into N antenna sub-arrays, the N being greater than or equal to 2; determining a sampling interval according to the sizes of the N antenna sub-arrays; determining sampling points according to the sampling interval; and determining the total radiated power of the entire array antenna according to the equivalent isotropic radiated power of the sampling points.