Sir,
With the circuit implemented to drive the DC motor using the two IR2110 IC's constructed in a full bridge form,
we are able to drive the DC Motor with the deadtime generated at the LIN and HIN inputs. But the output signals at LO and
Ho, with the CRO probes at the input of the Gate resisitors (22Ohms) the pulses we obtained are as shown in the attached files. Even though the dead time is generated, before the lower MOSFET turns off , the Upper MOSFET is being turned on, resulting in a very large spike at the current sense resistor. A diode resistor in parallel are also connected at the Gate of MOSFETs. I think , the MOSFETs we are using (IRF540N) are able to withstand this large current, so as per now we are not facing the short circuit problem. But at times, may be due to this reason our entire Full bridge section is getting burst and fail.
Please suggest me how to solve these large current spikes, and how to obtain a noisy free PWM waveforms at LO and HO.
PWM Frequency : 24KHz
MOSFET : IRF540N
Please acknowledge me at the earlier.
Thanking You.
With the circuit implemented to drive the DC motor using the two IR2110 IC's constructed in a full bridge form,
we are able to drive the DC Motor with the deadtime generated at the LIN and HIN inputs. But the output signals at LO and
Ho, with the CRO probes at the input of the Gate resisitors (22Ohms) the pulses we obtained are as shown in the attached files. Even though the dead time is generated, before the lower MOSFET turns off , the Upper MOSFET is being turned on, resulting in a very large spike at the current sense resistor. A diode resistor in parallel are also connected at the Gate of MOSFETs. I think , the MOSFETs we are using (IRF540N) are able to withstand this large current, so as per now we are not facing the short circuit problem. But at times, may be due to this reason our entire Full bridge section is getting burst and fail.
Please suggest me how to solve these large current spikes, and how to obtain a noisy free PWM waveforms at LO and HO.
PWM Frequency : 24KHz
MOSFET : IRF540N
Please acknowledge me at the earlier.
Thanking You.