An electrochromic system and method for controlling photochromic darkening of an electrochromic device, the system including an EC device, a control unit, a voltage detector, and a power supply. The EC device includes a working electrode, a counter electrode, and a solid-state polymer electrolyte disposed therebetween. The control unit is configured to control a sweep voltage applied between the working and counter electrodes, such that the sweep voltage is applied when an open circuit voltage (OCV) between the working and counter electrodes is less than a threshold voltage.

Electrochromic system and method for controlling photochromic darkening

The invention relates to a disk brake system for hauling engines and hauling winches, which is provided with at least two brake circuits, each brake circuit being associated with at least one brake caliper having associated brake pads, and two redundant, active control circuits (10, 12, 14, 16) being provided per brake circuit.

Disk brake system

The invention discloses a motor, a motor motion protection method and a device. The method comprises steps: the actual strength of current inputted to the motor is detected; the actual current strength is compared with the preset over-current protection value, wherein the over-current protection value is corresponding to the stroke position of the motor; if the actual current strength is larger than the over-current protection value, the power supply of the motor is cut off. During the motor motion process, different over-current protection values are set for different stroke positions, the over-current protection values can be used during the whole strokes of motor motion, possible error judgment caused by inputted large starting current when the motor is started can be avoided, accurate over-current protection value setting values can be obtained in no need of a large number of experimental tests, time wasted on testing the setting values of the over-current protection values can be reduced, consistency of processing and assembly of all parts is not required in the case of system mass production, and thus, demands on the mechanical processing technology and the mounting precision are low.

Motor, motor motion protection method and device

A thermal protection device and methods for protecting a motor are described. The thermal protection device is electrically coupled between a power supply and a gate drive circuit for driving the motor. The thermal protection device is configured to disconnect the power supply from the gate drive circuit when a temperature measured by the thermal protection device exceeds a threshold temperature value.

Thermal protection device and method for protecting a motor

To more accurately determine the temperature of a DC link capacitor (C) of a DC link converter (1), a device and a method are described in which the DC link capacitor (C) is modeled as a series circuit of a spare capacity (CS) and a spare series resistance (ESR) in which a modeled capacitor current (i Cm) flows via the equivalent series resistor (ESR). From the modeled capacitor current (i Cm) and the value of the equivalent series resistance (ESR), a modeled capacitor power loss (PC) is calculated by means of a first relationship of the form PC = f (i Cm, ESR) from which the capacitor temperature (TC ). In this case, no direct measurement of the capacitor temperature (T C), the capacitor current (i C) or the capacitor power loss (P C) is required. For example, a measurement of the capacitor voltage (u C) and a further calculation of the modeled capacitor current i Cm and finally the capacitor power loss (P C) is sufficient. The method can be used for observing and processing the capacitor temperature (T C), in particular switching off an element, preferably at least part of the intermediate circuit converter (1) when exceeding a, for example, preset, maximum temperature. Also, the method for determining the time course of the capacitor temperature (T C (t)) and further the determination of the residual life (RL) of the intermediate circuit capacitor (C) of a predetermined relationship, preferably on the Arrhenius formula can be used.

Method and device to measure temperature of an intermediate circuit capacitor

The method involves detecting impedance of an electrolytic capacitor (C) as an actual characteristic value during operation of electrical device under operation conditions for recognizing an approaching lifetime- and/or life utility end of the electrolytic capacitor. The impedance is compared with maximum impedance (Zmax) predetermined as limit characteristic value. A warning signal is produced depending on parameter of determined difference between the actual characteristic value and the limit characteristic value when reaching a preset minimum permissible difference. An independent claim is also included for an electrical device.

Method for life-cycle monitoring of an electrolyte condenser and device with a monitored electrolyte condenser

The control circuit (1) has a semiconductor end stage (2) that is controlled by an electronic commutation control (4) through a driver stage (6) for the time offset control of stator coils of the motor (M). The motor produces the magnetic rotating field for a rotor depending on the rotor rotation position. Two redundant stall protection units (10,12) monitor the motor during rotating operation of the rotor. The stall protection unit (10) deactivates driver stage and stall protection unit (12) shuts off the supply voltage for driver stage.

Fast and redundant overtemperature protection with safe-off for EC motor

The method involves determining maximum theoretical life span for determined and predetermined operating conditions. The current life span-calculations are carried out cyclically during the operation according to initial operation of the component taking into account the currently existing, actual operating conditions based on measured current operating parameters. The remaining life span is determined based on all the current life span-calculations since the initial operation. An independent claim is included for an electronically commutated electric motor with an electronic controller for executing the method.

Method for monitoring life span and for determining remaining life span of technical component, involves determining remaining life span based on all current life span-calculations since initial operation

A control circuit (1) for an electronically commutated, direct current motor (M) without a collector with a semiconductor end stage (2) which is controlled by an electronic commutation control (4) via a driver stage (6) for the time-offset control of the stator coils (U,V,W) of the motor (M) for the purpose of producing a magnetic rotating field for a rotor depending on the rotor rotation position. Two redundant stall protection units (10, 12) monitor the motor (M) during operation for rotation of the rotor, whereby in the case of a determined stall situation, the first stall protection unit (10) deactivates the driver stage (6) and the second stall protection unit (12) shuts off the supply voltage (UVCC) for the driver stage (6).

Driving circuit for an EC-motor

A control circuit (1) for an electronically commutated, direct current motor (M) without a collector with a semiconductor end stage (2) which is controlled by an electronic commutation control (4) via a driver stage (6) for the time-offset control of the stator coils (U, V, W) of the motor (M) for the purpose of producing a magnetic rotating field for a rotor depending on the rotor rotation position. Two redundant stall protection units (10, 12) monitor the motor (M) during operation for rotation of the rotor, whereby in the case of a determined stall situation, the first stall protection unit (10) deactivates the driver stage (6) and the second stall protection unit (12) shuts off the supply voltage (Uvcc) for the driver stage (6).

Martin Bürkert

Papers

Method for life-cycle monitoring of an electrolyte condenser and device with a monitored electrolyte condenser

Fast and redundant overtemperature protection with safe-off for EC motor

Method for monitoring life span and for determining remaining life span of technical component, involves determining remaining life span based on all current life span-calculations since initial operation

Driving circuit for an EC-motor

Control circuit for an EC-motor