Direct and indirect SMC control schemes for DC-DC switching converters

Shiau, Lin-Goei; Lin, Ja‐Chen

doi:10.1109/sice.1997.625015

Cited by 17 publications

(10 citation statements)

References 7 publications

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“…Traditional sliding mode control is realized by hysteresis control, owing to the switching frequency is fixed in phase-shift full-bridge circuit, duty cycle is used for indirectly control instead of frequency directly using sliding mode control to control the switch. (Shiau et al, 1997) When the switches Q 1 and Q 4 (or Q 2 and Q 3 ) in Fig.1 are switching on at the same time, its equivalent circuit is shown in Fig.4(a). When the switches Q 1 and Q 4 (or Q 2 and Q 3 ) in Fig.1 are not switching on at the same time, its equivalent circuit is shown in Fig.4…”

Section: The Sliding Mode Digital Control Of Phase Shift Full Bridgementioning

confidence: 99%

The Synthetic Control of SMC and PI for Arc Welding/cutting Power Supply

Zhu¹,

Kang²

2011

Sliding Mode Control

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Section: The Sliding Mode Digital Control Of Phase Shift Full Bridgementioning

confidence: 99%

The Synthetic Control of SMC and PI for Arc Welding/cutting Power Supply

Zhu¹,

Kang²

2011

Sliding Mode Control

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“…In all cases, the use of postfilter feedback generally serves to lessen the negative effects of the output filter. Many very similar solutions have appeared in the somewhat wider context of single-phase buck dc/dc converters, where PD-based capacitor voltage feedback is richly represented [20]- [23] along with capacitor current feedback [24], [25] and direct inductor current feedback [26]. It has also been shown that the equivalent series resistance of the output capacitor can be usefully incorporated into the capacitor current estimation system [27], relaxing the demands on the differentiation circuitry.…”

Section: Hysteresis-based So Controllersmentioning

confidence: 99%

Carrier Distortion in Hysteretic Self-Oscillating Class-D Audio Power Amplifiers: Analysis and Optimization

Hoyerby¹,

Andersen

2009

IEEE Trans. Power Electron.

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Abstract-An important distortion mechanism in hysteretic selfoscillating (SO) class-D (switch mode) power amplifiers--carrier distortion--is analyzed and an optimization method is proposed. This mechanism is an issue in any power amplifier application where a high degree of proportionality between input and output is required, such as in audio power amplifiers or xDSL drivers. From an average-mode point of view, carrier distortion is shown to be caused by nonlinear variation of the hysteretic comparator input average voltage with the output average voltage. This easily causes total harmonic distortion figures in excess of 0.1-0.2%, inadequate for high-quality audio applications. Carrier distortion is shown to be minimized when the feedback system is designed to provide a triangular carrier (sliding) signal at the input of a hysteretic comparator. The proposed optimization method is experimentally proven in an audio power amplifier leading to THD figures that are comparable to the state of the art. Experimental hardware is a hysteretic SO bandpass current-mode-controlled single-ended audio power amplifier capable of 45 W into 8 Ω or 80 W into 4 Ω from a ±34 V supply with less than 0.03% THD from 100 Hz to 6.7 kHz. Carrier distortion is shown to account for this limitation in THD performance.

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“…Because of its simplicity, SMC is very suitable for DC/DC switching converter control to improve the transient response. However, the steady-state accuracy is limited due to the non-ideal switching frequency and chattering problem [34]. With the development of digital signal processor (DSP), more and more digital DC/DC switching converter controllers are implemented with low cost.…”

Section: Introductionmentioning

confidence: 99%

A Novel Power Failure Compensation Control Method for Active Magnetic Bearings Used in High-Speed Permanent Magnet Motor

Liu

Mao

2016

IEEE Trans. Power Electron.

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Active magnetic bearings (AMBs) have been proved superior to conventional bearings in many ways. However, the AMB system will lose magnetic force if the power fails which may cause fatal damage to the rotor and the back-up bearings. In order to improve the reliability of the AMB system, a power failure compensation control (PFCC) method is proposed in this paper. A novel hardware composition of PFCC is designed to cooperate with the motor drives using either Pulse-Width Modulation (PWM) or Pulse-Amplitude Modulation (PAM) techniques. Once the power fails, the motor works as a generator and the back electromotive force (back EMF) is rectified by the anti-parallel diodes of the inverter. Meanwhile, a buck converter is utilized to convert the voltage from DC-link of the inverter to the supply voltage for the AMB system. When the motor speed is too low to supply high back EMF for the buck converter, the switches of the inverter are used to boost the DC-link voltage with the motor windings. Furthermore, a hybrid controller combining sliding mode control (SMC) with PID algorithm is introduced to improve the transient response of the buck converter. Several experimental results confirm the feasibility and effectiveness of the proposed method.Index Terms-High-speed permanent magnet (PM) motor, active magnetic bearing (AMB), power failure compensation control (PFCC), buck converter, sliding mode control (SMC)

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Direct and indirect SMC control schemes for DC-DC switching converters

Cited by 17 publications

References 7 publications

The Synthetic Control of SMC and PI for Arc Welding/cutting Power Supply

The Synthetic Control of SMC and PI for Arc Welding/cutting Power Supply

Carrier Distortion in Hysteretic Self-Oscillating Class-D Audio Power Amplifiers: Analysis and Optimization

A Novel Power Failure Compensation Control Method for Active Magnetic Bearings Used in High-Speed Permanent Magnet Motor

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