Patent ID: 8172451

Claim:
An electronic hand mixer for processing food materials, comprising: one or more beaters; a housing; a drive motor mounted in the housing, the drive motor adapted to apply rotational force to the beaters; a power control device for controlling electrical power supplied to the drive motor; a keypad for receiving instructions entered by users; a microprocessor for processing the instructions and sending signals to the power control device; and a memory for storing the instructions, wherein: the instructions comprise at least one user-defined mixing course, the user-defined mixing course comprises one or more mixing operations, and each of the mixing operations comprises a user-defined running speed of the drive motor associated with a user-defined running period of time of the drive motor; when a motor temperature rising speed reaches and passes a predetermined maximum value, the operation for protecting the drive motor is started; and when a motor speed feedback signal is equal to zero or is greatly lower than a target value, the operation for protecting the drive motor is started.