Title:
CURRENT SOURCE
Document Type and Number:
Japanese Patent JPS6046780
Kind Code:
A
Abstract:
The invention relates to a controlled source of current (1) having an inductive load (3), particularly a gradient coil adaptable to a nuclear spin imaging assembly. In order to cut down the reversal time of a current flowing in the load, the circuit is provided, according to the invention, with controlled energy storage instruments (2) connected in series with source of current (1) and inductive load (3) for increasing the rate of conversion of energy stored in said inductive load (3). Said instruments (2) preferably comprise capacitor means (C1, C2) and switch means (F1 . . . F4) for controlling the capacitors, facilitating a quick transfer of energy into or out of load (3). Said switch means (F1 . . . F4) are controlled by means of instruments (6) sensing a current flowing in inductive load (3), the conversion of energy being thus accurately controlled.
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Inventors:
YUHANI KUPIAINEN
Application Number:
JP8166784A
Publication Date:
March 13, 1985
Filing Date:
April 23, 1984
Export Citation:
Assignee:
INSTRUMENTARIUM OY
International Classes:
A61B10/00; A61B5/055; G01R33/381; G01R33/385; H02J15/00; H02M9/00; H03K3/57; H03K17/687; (IPC1-7): A61B10/00; G01N24/06; H02J15/00; H02M9/00
Domestic Patent References:
| JPS5335895A | 1978-04-03 | |||
| JPS58192537A | 1983-11-10 |
Attorney, Agent or Firm:
Kyozo Yuasa