| 摘要 |
PURPOSE: A coil driving apparatus of an electromagnetic brake system is provided to remove the power consumption of an existing freewheeling diode by replacing the freewheeling diode. CONSTITUTION: A coil driving apparatus of an electromagnetic brake system comprises a coil(10), a first switching element(30), MCU(main control unit)(40), a second switching element(50), a charge pump circuit(60), a third switching element(70), a reverse current prevention diode(80), and an inverting circuit(90). The coil operates a hydraulic valve. The first switching element connects and cutoff the current of the coil by switching battery voltage applied to the coil. The MCU outputs the driving signals of the coil current to the first switching element. The second switching element prevents the malfunction of the hydraulic valve. The charge pump circuit connects the second switching element and the MCU. The inverting circuit generates driving signals through inverting based on the coil current driving signals of the first switching element and outputs the signals to the third switching element. [Reference numerals] (20) Battery; (40) MCU; (60) Charge pump circuit; (90) Inverting circuit |
