MOTORIZED TOOL - MAEDA METAL IND

Title:

MOTORIZED TOOL

Document Type and Number:

WIPO Patent Application WO/2011/099506

Kind Code:

A1

Abstract:

Disclosed is a motorized tool such that phase control using transistors or antiphase control using the same is performed in an inexpensive and simple configuration and that electromagnetic noise is suppressed. For this purpose, a constant voltage generation means of the motorized tool comprises a series circuit consisting of a resistor (91) and a diode (93), and a parallel circuit consisting of a capacitor (95) and a zener diode (97). One end of the resistor (91) is connected to a connection point between an alternating current power supply (1) and an alternating current motor (3). The cathode of the diode (93) is connected to one end of the capacitor (95) and to the cathode of the zener diode (97). The other end of the capacitor (95) and the anode of the zener diode (97) are connected to a source for transistors (51, 52). First ends of resistors (53, 54) are connected to the gates of the transistors (51, 52). The voltages at second ends of the resistors (53, 54) are switched between the voltage at the source for transistors (51, 52) and the voltage at the connection point between the series circuit and the parallel circuit, with the result that the transistors (51, 52) are turned on and off.

Inventors:

OBATAKE TAKAYOSHI (JP)

Application Number:

PCT/JP2011/052717

Publication Date:

August 18, 2011

Filing Date:

February 09, 2011

Export Citation:

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Assignee:

MAEDA METAL IND (JP)
OBATAKE TAKAYOSHI (JP)

International Classes:

B25F5/00; H02P21/05; H02P23/04; H02P25/04; H02P27/02

Foreign References:

JPH09219987A	1997-08-19
JP2005073350A	2005-03-17
JP2007229891A	2007-09-13
JP2003052195A	2003-02-21
JP2006000937A	2006-01-05
JP2006297574A	2006-11-02
JP2009012149A	2009-01-22
JPH08154392A	1996-06-11
JPH11161346A	1999-06-18

Other References: