scholarly journals Current Mode Control of a Series LC Converter Supporting Constant-Current Constant-Voltage (CCCV)

2019 ◽  
Author(s):  
Michael Heidinger ◽  
Qihao Xia ◽  
Christoph Simon ◽  
Fabian Denk ◽  
Santiago Eizaguirre ◽  
...  
Keyword(s):  
Control Algorithm ◽  
Current Mode ◽  
Open Loop ◽  
Power Supplies ◽  
Constant Current ◽  
Loop Current ◽  
Constant Voltage ◽  
Large Signal ◽  
Current Mode Control ◽  
Voltage Controller

This paper presents a control algorithm for soft-switching series LC converters. The conventional voltage-to-voltage controller is split into a master and a slave controller. The master controller implements constant-current-constant-voltage (CCCV) control, required for demanding applications, i.e. lithium battery charging or laboratory power supplies. It defines the set-current for the open-loop current slave controller, which generates the PWM parameters. The power supply achieves fast large-signal responses, e.g. from 5 V to 24 V, where 95% of the target value is reached in less than 400 µs. The design is evaluated extensively in simulation and on a prototype. A consensus between simulation and measurement is achieved.

scholarly journals Current Mode Control of a Series LC Converter Supporting Constant Current, Constant Voltage (CCCV)

Energies ◽  
2019 ◽  
Vol 12 (14) ◽  
pp. 2793
Author(s):  
Michael Heidinger ◽  
Qihao Xia ◽  
Christoph Simon ◽  
Fabian Denk ◽  
Santiago Eizaguirre ◽  
...  
Keyword(s):  
Pulse Width Modulation ◽  
Current Mode ◽  
Open Loop ◽  
Power Supplies ◽  
Constant Current ◽  
Loop Current ◽  
Constant Voltage ◽  
Large Signal ◽  
Current Mode Control ◽  
Voltage Controller

This paper introduces a control algorithm for soft-switching series LC converters. The conventional voltage-to-voltage controller is split into a master and a slave controller. The master controller implements constant current, constant voltage (CCCV) control, required for demanding applications, for example, lithium battery charging or laboratory power supplies. It defines the set-current for the open-loop current slave controller, which generates the pulse width modulation (PWM) parameters. The power supply achieves fast large-signal responses, e.g., from 5 V to 24 V , where 95% of the target value is reached in less than 400 s . The design is evaluated extensively in simulation and on a prototype. A match between simulation and measurement is achieved.

A computer-controlled stimulator with applications to cardiac electrophysiology

1980 ◽  
Vol 239 (2) ◽  
pp. H278-H282
Author(s):  
V. Elharrar
Keyword(s):  
Cardiac Electrophysiology ◽  
Current Mode ◽  
Pulse Amplitude ◽  
Constant Current ◽  
Constant Voltage ◽  
S 100 ◽  
Computer Controlled ◽  
Constant Current Mode

A computer-controlled stimulator compatible with S-100 microcomputers using an 8080 or Z-80 microprocessor is described. The pusle interval is controlled from 1 to 65,535 ms and the pulse duration from 1 to 255 ms by steps of 1 ms. The pulse amplitude is controlled from 0 to 10.24 V (in constant voltage mode) and from 0 to 1 mA (in constant current mode) by steps of 4 mV and 4 mu A, respectively. The characteristics of the stimuli and their timing can be altered automatically according to programmed protocols that may or may not take into account the response of the biologic preparation. Applications of this stimulator to the study of experimental cardiac electrophysiology are illustrated in vivo and in vitro.

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