| Title |
Hysteresis Current Control with Self-Locked Frequency Limiter for VSI Control |
| Authors |
최연호(Choe, Yeon-Ho) ; 임성운(Im, Seong-Un) ; 권우현(Gwon, U-Hyeon) |
| Keywords |
lock-out ; frequency limiter ; hysteresis ; PWM ; current control |
| Abstract |
A hysteresis control is widely used to control output current of inverter. A hysteresis bandwidth is affected by system parameters such as source voltage, device on/off time, load inductance and resistance. The frequency limiter is used to protect switching devices overload. In the conventional hysteresis controller, a lock-out circuit with D-latch and timer is used to device protection circuit. But switching delay time and harmonic components are appeared in output current. In this paper the performance of lock-out circuit is tested, and new circuit for switching device fault protection is proposed ad it's performance is simulated. |