Simple Lossless Inductive Snubbers-Assisted Series Load Resonant Inverter Operating under ZCS-PDM Scheme for High-Frequency Induction Heating Fixed Roller
Abstract
:1. Introduction
2. Schematic of Induction Heating Fixed Roller and Its Equivalent Circuit
2.1. Schematic Structure of Induction Heating Fixed Roller
2.2. Transformer Circuit Model for IH Load
2.3. Theoretical Analysis of IH Load Parameters
3. ZCS Series Load Resonant High-Frequency Inverter Employing PDM Control
3.1. Circuit Description
3.2. Principle of Operation
3.3. Operation of the Circuit
- Mode 1
- With switch S1 in the conduction mode, the power is delivered to the resonant capacitor Cr, snubber inductor LS1 and the IH load. The attenuated sinusoidal resonance starts through the IH load.
- Mode 2
- When load current iL decreases through S1 to zero at t = t1, anti-parallel diode DS1 is naturally turned on. At turn-off transition, this results in S1 achieving complete ZCS-and-ZVS hybrid soft commutation.
- Mode 3
- While diode DS1 is in conducting mode, the S2 switch turns on at t = t2. Consequently, the DS1 current commutates to S2. Eventually, the DS1 current is completely transferred to switch S2 by snubber inductor LS2. Therefore, switch S2 achieves ZCS turn-on.
- Mode 4
- While switch S2 is still in conduction mode, the diode DS1 current becomes zero at t = t3. Then, Cr delivers the output power to the IH load. This results in the attenuated sinusoidal resonance starting through the IH load.
- Mode 5
- As the load current iL increases, the S2 current decreases to zero at t = t4. As a result, anti-parallel diode DS2 is naturally turned on and S2 turns off by complete ZVS and ZCS throughout this operating mode.
- Mode 6
- While diode DS2 is still in conduction mode, switch S1 turns on at t = t5. The DS2 current begins to commutate to switch S1. Eventually, the DS2 current is completely transferred to switch S1 due to snubber inductor LS1. As the result, switch S1 is turned on with the ZCS condition, and the circuit operation Modes 1–6 repeat.
4. Experimental Results and Performance Evaluations
4.1. Voltage and Current Waveforms
4.2. Power Conversion Efficiencies
4.3. Analysis of Power Loss
4.4. Halogen Lamp Heater Comparative Characteristics
5. Conclusions
Author Contributions
Funding
Conflicts of Interest
References
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Item | Symbol | Value |
---|---|---|
DC input voltage | Vin | 280 V |
Resonant capacitor | Cr | 0.49 µF |
Frequency of switching | f | 20 kHz |
Frequency of PDM | f PDM | 400 Hz |
Snubber inductor | LS1, LS2 | 12 μH |
Heating coil self-inductance | L1 | 90 μH |
IH load time constant | τ | 9.23 μs |
Electromagnetic coefficient of coupling | k | 0.48 |
IGBT (Mitsubishi: CT75AM-12) | IC | 75 A |
VCE | 600 V |
Item | IH Fixed Roller | Halogen Lamp Heater |
---|---|---|
Rise time to 185 °C | 27.9 s | 36.1 s |
Idling mode power consumption | 52 Wh | 57 Wh |
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Ogura, K.; Chandhaket, S.; Kolhe, M.L.; Sakphrom, S.; Mekhilef, S. Simple Lossless Inductive Snubbers-Assisted Series Load Resonant Inverter Operating under ZCS-PDM Scheme for High-Frequency Induction Heating Fixed Roller. Appl. Sci. 2022, 12, 1122. https://doi.org/10.3390/app12031122
Ogura K, Chandhaket S, Kolhe ML, Sakphrom S, Mekhilef S. Simple Lossless Inductive Snubbers-Assisted Series Load Resonant Inverter Operating under ZCS-PDM Scheme for High-Frequency Induction Heating Fixed Roller. Applied Sciences. 2022; 12(3):1122. https://doi.org/10.3390/app12031122
Chicago/Turabian StyleOgura, Koki, Srawouth Chandhaket, Mohan Lal Kolhe, Siraporn Sakphrom, and Saad Mekhilef. 2022. "Simple Lossless Inductive Snubbers-Assisted Series Load Resonant Inverter Operating under ZCS-PDM Scheme for High-Frequency Induction Heating Fixed Roller" Applied Sciences 12, no. 3: 1122. https://doi.org/10.3390/app12031122
APA StyleOgura, K., Chandhaket, S., Kolhe, M. L., Sakphrom, S., & Mekhilef, S. (2022). Simple Lossless Inductive Snubbers-Assisted Series Load Resonant Inverter Operating under ZCS-PDM Scheme for High-Frequency Induction Heating Fixed Roller. Applied Sciences, 12(3), 1122. https://doi.org/10.3390/app12031122