| Danaher Motion Stockholm AB Patent applications |
| Patent application number | Title | Published |
|---|
| 20110188158 | PROTECTION CIRCUIT FOR A DRIVE CIRCUIT OF A PERMANENT MAGNET MOTOR AND CORRESPONDING SYSTEM - It is presented a protection circuit for a drive circuit of a permanent magnet motor being powered by a main DC source. The protection circuit comprises a protection circuit DC source; a changeover switch being arranged to select an input to a gate of a main drive switch of the drive circuit, the input being selectable between an output of the protection circuit DC source and a second control signal; and a changeover control device connected to control the changeover switch, which changeover control device is arranged to ensure that the changeover switch is connected to the output of the second side of the protection circuit DC source when an overvoltage is detected. | 08-04-2011 |
| 20110127007 | COOLING DEVICE AND METHOD FOR THE MANUFACTURING THEREOF - A cooling device comprises a main body ( | 06-02-2011 |
| 20100148830 | GATE DRIVER CIRCUIT, SWITCH ASSEMBLY AND SWITCH SYSTEM - It is presented a gate driver circuit for driving an electric switch, the switch being arranged to control a main current using a gate signal. The gate driver circuit comprises: a non-linear capacitor means having a lower capacitance when an applied voltage is under a threshold voltage and a higher capacitance when an applied voltage is over the threshold voltage, wherein the non-linear capacitor is arranged to be connected between a high voltage connection point of the switch and a connection point for the gate signal; a current change rate sensor, the current change rate sensor being configured to detect changes in a main current of the electric switch and to control a gate signal of the electric switch depending on the current change; a gate buffer; and at least one current source, arranged to drive the gate buffer. The current change rate sensor is connected to control the current source to thereby control the gate signal of the electric switch. | 06-17-2010 |
