Title:
ＰＷＭコンデンサの制御
Document Type and Number:
Japanese Patent JP6888017
Kind Code:
B2
Abstract:
Methods, systems, and devices for controlling a variable capacitor. One aspect features a variable capacitance device that includes a capacitor C1), a first transistor (M1), a second transistor (M2), and control circuitry. The control circuitry is configured to adjust an effective capacitance of the capacitor by performing operations including detecting a zero-crossing of an input current (I1) at a first time. Switching off the first transistor. Estimating a first delay period for switching the first transistor on when a voltage across the capacitor is zero. Switching on the first transistor after the first delay period from the first time. Detecting a zero-crossing of the input current at a second time. Switching off the second transistor. Estimating a second delay period for switching the second transistor on when a voltage across the capacitor is zero. Switching on the second transistor after the second delay period from the second time.
Inventors:
Millisaf Danilovich
Application Number:
JP2018541349A
Publication Date:
June 16, 2021
Filing Date:
February 08, 2017
Export Citation:
Assignee:
WITRICITY CORPORATION
International Classes:
H01G7/00; H02J50/12; H02M7/04; H02M7/48
Domestic Patent References:
| JP2001023783A | ||||
| JP2003348854A | ||||
| JP2009147204A | ||||
| JP2015181114A |
Foreign References:
| US20100102638 | ||||
| US20150278681 | ||||
| WO2010010710A1 |
Attorney, Agent or Firm:
Kenji Sugimura
Mitsutsugu Sugimura
Yuki Suzuki
Mitsutsugu Sugimura
Yuki Suzuki