Patent ID: 6118235
Filing Date: 2000-09-12
Classification: H02P

Abstract:
An electronic driver for generating oscillating, controllably variable amplitude motion of the moving element of a linear motor, the motor having a winding with first and second terminals, the motor oscillating at a frequency denoted herein by F, the driver consisting of the following combination,first and second P channel field effect transistors, referred to herein as P1 and P2, with source, gate and drain terminals referred to herein as SP1,GP1,DP1 and SP2,GP2,DP2 respectively,first and second N channel field effect transistors, referred to herein as N1 and N2, with source, gate and drain terminals referred to herein as SN1,GN1,DN1 and SN2,GN2,DN2 respectively,four diodes, referred to herein as D1 through D4,a source of DC voltage with positive and negative terminals that are referred to herein as V+ and ground respectively,a first circuit node, formed by electrically connecting together all of the following terminals; DN1, DP2, cathode of D1, anode of D4, and said first motor terminal,a second circuit node, formed by electrically connecting together all of the following terminals; DN2, DP1, cathode of D3, anode of D2, and said second motor terminal,a third circuit node, formed by electrically connecting together all of the following terminals; SP1, SP2, cathode of D2, cathode of D4, and V+,a fourth circuit node, formed by electrically connecting together all of the following terminals; SN1, SN2, anode of D1, anode of D3, and ground,a first train of rectangular voltage pulses of frequency F and controllable duration t, the first train and its complement referred to herein as VG1 and VG1C respectively, VG1 applied to GN1, VG1C applied to GP1, the high and low levels of VG1 being V+ and ground respectively,a second train of rectangular voltage pulses of frequency F and controllable duration t, the second train identical to said first pulse train except for a displacement in time relative to said first train by (1/2 F), the second train and its complement referred to herein as VG2 and VG2C respectively, the high and low levels of VG2 being V+ and ground respectively, VG2 applied to GN2, VG2C applied to GP2.