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| Number | Title | Issue Date |
| 6998812 | Method for determining the mass moment of inertia of an electric motor drive system A method for determining the mass moment of inertia of an electric motor drive system of a machine, having a drive motor and further drive elements arranged downstream of the drive motor. The method includes a) determining a compensation current, which compensates l... | 02/14/2006 |
| 6650076 | Current profile method and apparatus for controlling gate operation A method and apparatus for moving a gate a distance in a predetermined period of time. In one embodiment the current load for an electric motor to move a gate is first measured to determine whether the gate's motion is being hindered or helped. A micropro... | 11/18/2003 |
| 6611125 | Method for calculating inertia moment and driver for electric motor An electric motor is rotated at a velocity ω1. After that, during Ɗt12 seconds, the 1st acceleration is executed at a rate (ω2 -ω1)/Ɗt12. During this acceleration, the torque ͌m is ca... | 08/26/2003 |
| 5477114 | Method and system for estimating inertia of 2-mass system during speed control A method and system for estimating an inertia of 2-mass system constituted by a motor and a load connected through a torsionable shaft during operation. The estimating method is implemented as follows: (a) obtaining a deviation between a motor speed prese... | 12/19/1995 |
| 5268564 | Bar code scanner actuated by detection of scanner motion A bar code scanner which is responsive to the movement of the scanner to activate its light source. The scanner includes a motor having a moving member which is set in motion when the scanner is displaced from a rest position. The moving member generates ... | 12/07/1993 |
| 4199711 | Control apparatus for electric motor vehicles A control apparatus for an electric motor vehicle includes a control system to increase the duty cycle of a chopper circuit driving an electric drive motor of the vehicle when a spontaneous backward movement takes place upon starting of the vehicle at an ... | 04/22/1980 |
| 4144481 | Control devices A control device for electronic apparatus is provided with a d.c. ironless motor coupled to a manually rotatable knob. As the knob is rotated a digital signal representative of the rotation is derived from the back e.m.f. of the motor.... | 03/13/1979 |
| 4107585 | Control devices A control device which is suitable for use with electronic apparatus is used to scan a range of signal or data values, such as a frequency spectrum, and to cease scanning when a selected parameter is found. The scanning operation is driven by a d.c. ironl... | 08/15/1978 |
