| 摘要 |
PURPOSE: A motor drive controller and a control method are provided to control a motor via multiple magnetic sensors which are used for driving currents of motor and detect a phase of a rotor of the motor, thereby facilitating easy detection of the phase. CONSTITUTION: A motor drive controller includes a first phase detection circuit(10) including three comparators, a second phase detection circuit(120) including three comparators, a phase dividing circuit(20), a signal selection circuit(21), a third phase detection circuit(30) including multiple voltage sources and multiple phase detectors, and a synthesis circuit(40). A sensor integrated circuit is provided around a rotor of a motor, and a motor driver controller is connected to the motor via the sensor integrated circuit. Magnetic sensors in the sensor integrated circuit output differential sensor signals. The respective differential sensor signals are amplified by a signal amplifier-converter circuit(50) that has three amplifiers. [Reference numerals] (10) First phase detection circuit; (120) Second phase detection circuit; (20) Phase dividing circuit; (21) Signal selection circuit; (30) Third phase detection circuit; (40) Synthesis circuit; (50) Signal amplification circuit; (AA) Synthesized phase information signal; (M1) Rotor; (phA) First phase information signal; (phB) Second phase information signal; (phC) Third phase information signal |
