Time-Domain Design of Digital Compensators for PWM DC-DC Converters

Peretz, Mor Mordechai; Ben‐Yaakov, S.

doi:10.1109/tpel.2011.2160358

Cited by 57 publications

(12 citation statements)

References 15 publications

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“…The system loop-gain, BH f Z o includes a single left-half-plane pole, which suggests the closed-loop response to changes in the reference is stable and of first-order. Since the characteristic equation is identical to all the perturbations, the stability of the system to changes in the input voltage or the load depends on H io and G v1 alone [45]. As can be observed from (19), H io and G v1 are constants and therefore, stability is guaranteed.…”

Section: Appendix a Average-behavioral Model And Stability Analysismentioning

confidence: 99%

Resonant Switched-Capacitor Voltage Regulator With Ideal Transient Response

Cervera

Peretz

2015

IEEE Trans. Power Electron.

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A new, small and efficient voltage regulator, realized using a resonant switched capacitor converter technology, is introduced. Voltage regulation is implemented by means of simple digital pulse density modulation. It displays an ideal transient response with a zero-order nature to all disturbance types. The newly developed topology acts as a gyrator with a wide range of voltage conversion ratios (below as well as above unity) with constant efficiency characteristics for the entire operation range. The operation of the voltage regulator is verified on a 20W experimental prototype, demonstrating ideal transient recovery without over/under-shoots in response to load and line transients. Simple design guidelines for the voltage regulation system are provided and verified by experiments. Index Terms-Switch-mode power supplies, switched capacitor converters, voltage regulation, pulse density modulation, digital control, ideal transient recovery I. 0885-8993 (c)

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Section: Appendix a Average-behavioral Model And Stability Analysismentioning

confidence: 99%

Resonant Switched-Capacitor Voltage Regulator With Ideal Transient Response

Cervera

Peretz

2015

IEEE Trans. Power Electron.

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“…Expressions for the calculation of proportional-integral-derivative PID1 compensator are Equations (14)- (16). The transfer function is Equation (14), the difference equation is Equation (15) and Equation (16) provides the location of zero 1 (note that the frequency of the other zero is determined by the value of K 1 ).…”

Section: Compensator Calculationmentioning

confidence: 99%

“…These techniques are suitable for keeping different quantities in control, typically current and voltage. Therefore, they can be considered as an alternative in multiple loop control structures.Reference [15] proposes a time-domain design method. The digital compensator is derived from specified rise time and overshoot.…”

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confidence: 99%

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Computer-Aided Design of Digital Compensators for DC/DC Power Converters

et al. 2018

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Digital control of high-frequency power converters has been used extensively in recent years, providing flexibility, enhancing integration, and allowing for smart control strategies. The core of standard digital control is the discrete linear compensator, which can be calculated in the frequency domain using well-known methods based on the frequency response requirements (crossover frequency, f c , and phase margin, PM). However, for a given compensator topology, it is not possible to fulfill all combinations of crossover frequency and phase margin, due to the frequency response of the controlled plant and the limitations of the compensator. This paper studies the performance space (f c , PM) that includes the set of achievable crossover frequencies and phase margin requirements for a combination of converter topology, compensator topology, and sensors, taking into account the effects of digital implementation, such as delays and limit cycling. Regarding limit cycling, two different conditions have been considered, which are related to the design of the digital compensator: a limited compensator integral gain, and a minimum gain margin. This approach can be easily implemented by a computer to speed up the calculations. The performance space provides significant insight into the control design, and can be used to compare compensator designs, select the simplest compensator topology to achieve a given requirement, determine the dynamic limitations of a given configuration, and analyze the effects of delays in the performance of the control loop. Moreover, a figure of merit is proposed to compare the dynamic performance of the different designs. The main goal is to provide a tool that identifies the most suitable compensator design in terms of the dynamic performance, the complexity of the implementation, and the computational resources. The proposed procedure to design the compensator has been validated in the laboratory using an actual DC/DC converter and a digital hardware controller. The tests also validate the theoretical performance space and the most suitable compensator design for a given dynamic specification.Energies 2018, 11, 3251 2 of 21 power factor corrector. In [13,14], state feedback is applied to multiphase power converters to ensure current-sharing. These techniques are suitable for keeping different quantities in control, typically current and voltage. Therefore, they can be considered as an alternative in multiple loop control structures.Reference [15] proposes a time-domain design method. The digital compensator is derived from specified rise time and overshoot. In [16], the compensator is designed based on the Internal Model Control design method used in motor control. In [17], complex zero compensation is used to improve transient response. In [18], the root locus method is applied to the calculation of a digital controller for a multiphase buck converter.Frequency domain techniques are very popular when designing analog linear compensators for DC/DC converters [19]. The compensator is calcula...

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“…Following the proliferation of digital control technology [26]- [31], both boundary and hybrid control methods have regained popularity. In particular, sliding-mode control [32]- [35] and its extension have been exemplified for buck converters [36]- [39].…”

Section: Introductionmentioning

confidence: 99%

Stability Analysis of Boundary and Hybrid Controllers for Indirect Energy Transfer Converters

Kirshenboim

Peretz

2016

IEEE Trans. Power Electron.

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In boost converters and other indirect energy transfer topologies, transient-oriented controllers are designed to facilitate a dynamic response that may range from minimum time up to minimum output voltage deviation. Since analytical definitions for these control laws can become quite complex, a large-signal stability verification is not immediate. This paper explores the existence of stability of indirect energy transfer converters that are controlled by either boundary or hybrid controllers and introduces a new simplified procedure for examination of large-signal stability of a given converter and load type using a graphical-analytical approach. The stability analysis and examination method are demonstrated on a boost converter loaded by resistive load and constant current load. The stability conditions are verified using a 30W 3.3V-to-12V boost converter prototype, controlled by a programmable-deviation controller and time-optimal controller, verifying their large-signal stability.

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Time-Domain Design of Digital Compensators for PWM DC-DC Converters

Cited by 57 publications

References 15 publications

Resonant Switched-Capacitor Voltage Regulator With Ideal Transient Response

Resonant Switched-Capacitor Voltage Regulator With Ideal Transient Response

Computer-Aided Design of Digital Compensators for DC/DC Power Converters

Stability Analysis of Boundary and Hybrid Controllers for Indirect Energy Transfer Converters

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