Design of a Highly Accuracy PSR CC/CV AC–DC Converter Based on a Cable Compensation Scheme Without an External Capacitor

Chang, Changyuan; He, Luyang; Bian, Bin; Xiong, Han

doi:10.1109/tpel.2019.2893737

Cited by 25 publications

(4 citation statements)

References 22 publications

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“…For the PMSM drive control system that uses sampling resistors, the current is sampled by the analog-to-digital converter (ADC) of the control chip after passing through the operational amplifier and other conditioning circuits. The current value can be reflected by the value of the potential difference on the sampling resistor [ 41 ]. Phase current values sampling by ADC can be expressed as:

where: i a_AD and i b_AD are the sampling value of ADC corresponding to the phase current, respectively; Z a and Z b are the value of impedance corresponding to the a-phase and b-phase sampling resistor, respectively; i a_act and i b_act are the actual value of the phase current, respectively; K opa_a and K opa_b are the gain of amplifier circuits of the a-phase and b-phase, respectively.…”

Section: Current Measurement Error Modelmentioning

confidence: 99%

“…For the PMSM drive control system that uses sampling resistors, the current is sampled by the analog-to-digital converter (ADC) of the control chip after passing through the operational amplifier and other conditioning circuits. The current value can be reflected by the value of the potential difference on the sampling resistor [41]. Phase current values sampling by ADC can be expressed as:…”

Section: Sources Of Current Sampling Errorsmentioning

confidence: 99%

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Analysis and Compensation of Phase Current Measuring Error Caused by Sensing Resistor in PMSM Application

Cheng,

Hu,

et al. 2024

Sensors

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Field Oriented Control (FOC) effectively realizes independent control of flux linkage and torque, and is widely used in application of Permanent Magnet Synchronous Motor (PMSM). However, it is necessary to detect the phase current information of the motor to realize the current closed-loop control. The phase current detection method based on a sampling resistor will cause a measurement error due to the influence of parasitic parameters of the sampling resistor, which will lead to the decrease in PMSM control performance. This paper reveals the formation mechanism of the current sampling error caused by parasitic inductance and capacitance of the sampling resistor, and further confirms that the above error will lead to the fluctuation of the electromagnetic torque output by simulation. Moreover, we propose an approach for online observation and compensation of the current sampling error based on PI-type observer to suppresses the torque pulsation of PMSM. The phase current sampling error is estimated by the proportional and integral (PI) observer, and the deviation value of current sampling is obtained by low-pass filter (LPF). The above deviation value is further injected into the phase current close-loop for error compensation. The PI observer continues to work to keep the current sampling error close to zero. The simulation platform of Matlab/Simulink (Version: R2021b) is established to verify the effectiveness of online error observation and compensation. Further experiments also prove that the proposed method can effectively improve the torque fluctuation of the PMSM and enhance its control accuracy performance of rotation speed.

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Section: Current Measurement Error Modelmentioning

confidence: 99%

“…For the PMSM drive control system that uses sampling resistors, the current is sampled by the analog-to-digital converter (ADC) of the control chip after passing through the operational amplifier and other conditioning circuits. The current value can be reflected by the value of the potential difference on the sampling resistor [41]. Phase current values sampling by ADC can be expressed as:…”

Section: Sources Of Current Sampling Errorsmentioning

confidence: 99%

Analysis and Compensation of Phase Current Measuring Error Caused by Sensing Resistor in PMSM Application

Cheng,

Hu,

et al. 2024

Sensors

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“…Combining these two advantages, the flyback converter and forward converter are widely regarded in power supply engineering design. Flyback topology in the same switching cycle, the original with vice and the inductance of the induced electromotive force polarity, will be adaptive to change and does not need extra inductance reset circuit (Chang et al, 2019). Therefore, the flyback converter has the advantage of simple structure compared with the forward converter (Tang et al, 2021a;Chen et al, 2021;Leng and Chiu, 2021;Wu et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

Primary-side control for the flyback AC–DC converter

2023

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“…In the fields of small and medium power and low-cost power supply, a long cable is widely utilised to connect the output terminals of the adapters with the load device such as cell phone, flat plate and so on [1][2][3]. However, as the cable becomes longer and more sophisticated, the existence of cable impedance brings about more and more problems, among which the decline of output voltage has captured the attention of experts and scholars.…”

Section: Introductionmentioning

confidence: 99%

Design of a high‐precision constant voltage flyback converter

Wang

et al. 2020

IET Circuits, Devices & Systems

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A small-signal model is established for the basic constant voltage (CV) flyback converter firstly. Then the phase margin and the bandwidth, which can reflect the system stability and rapidity, are deduced through transfer function. The parameters affecting the stability of the system can be obtained by the model's derivation to confirm the appropriate external capacitance value. To improve the precision of CV, the compensation of cable is implemented through the module of irrigation current, pulling down the output voltage under any load conditions to the value of it with the maximal load. The prototype for the proposed CV converter has been fabricated in an MXIC 0.8 μm L80A1 process. The minimal static power consumption measured by a test is only 40 mW. In the CV mode, the precision of the output voltage can reach the level of ±1.5%. Therefore, the proposed control chip has a promising application in low power CV AC-DC flyback converter.

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Design of a Highly Accuracy PSR CC/CV AC–DC Converter Based on a Cable Compensation Scheme Without an External Capacitor

Cited by 25 publications

References 22 publications

Analysis and Compensation of Phase Current Measuring Error Caused by Sensing Resistor in PMSM Application

Analysis and Compensation of Phase Current Measuring Error Caused by Sensing Resistor in PMSM Application

Primary-side control for the flyback AC–DC converter

Design of a high‐precision constant voltage flyback converter

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