Method of operation of capacitive actuator charging and discharging circuit arrangement
A technology of circuit devices and actuators, applied in battery circuit devices, circuit devices, circuits, etc., can solve the problems of limited output voltage of power supply voltage sources, expensive DC/DC converters, etc.
Active Publication Date: 2018-03-02
VTESCO TECH GMBH
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Problems solved by technology
[0014] It is now desired on the one hand to obtain as high an actuator voltage as possible, but on the other hand it is desirable to keep the output voltage of the supply voltage source limited, since it must be taken from the voltage of the motor vehicle battery, for example by means of a DC / DC converter
The higher the output voltage of the supply voltage source, the more expensive the DC / DC converter usually required
Method used
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Embodiment Construction
[0031] as already in image 3 as in Figure 4 The current I through capacitive actuator P1 is first shown in P1 , where the current is large enough to still reach the upper cut-off threshold SW1. This is Curve I. If the current is not cut off, the current will go through a full sine half wave as shown by the dotted line until the current decays to 0 amps again.
[0032] Furthermore, the following is shown as curve II: Charging current I P1 The upper cut-off threshold SW1 is still just reached, and therefore the first power transistor T1 is switched off, and the current then passes through the freewheeling path with diode D2 ( figure 1 ) decays. Here too, a complete sinusoidal half-wave is shown with a dotted line.
[0033] Finally, the time-controlled shut-off process according to the invention is represented by curves III, IV and V. there, at time T III or T IV or T V cuts off the current through capacitive actuator P1 in such a way that at precisely these moments T...
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The invention relates to a method for operating a charging and discharging circuit arrangement of at least one capacitive actuator, the circuit arrangement comprising a series circuit consisting of a first and a second power transistor each having a diode connected in parallel, which are connected between the potentials of a supply voltage source , the connection node of the two power transistors is connected via a coil to the terminal of at least one capacitive actuator, in order to charge the capacitive actuator, the first power transistor, which connects the capacitive actuator to the positive potential of the supply voltage source, can be given in advance It is controlled to be periodically turned on during a certain period of time, and is controlled to be turned off when the current flowing through the capacitive actuator reaches a predetermined first threshold until the current through the actuator reaches a value higher than the first threshold A lower predetermined second threshold value, for the case where the actuator current no longer reaches the predetermined first threshold value, the first power transistor is controlled after a time corresponding to the value reached by the actuator current maximum to Deadline.
Description
technical field [0001] The invention relates to a method for operating a circuit arrangement for charging and discharging at least one capacitive actuator, said circuit arrangement comprising a series circuit of first and second power transistors each having a diode connected in parallel, said series circuit is connected between the potentials of a supply voltage source, wherein the connection node of the two power transistors is connected via a coil to a terminal of at least one capacitive actuator. In order to charge the capacitive actuator, the first power transistor, which connects the capacitive actuator to the positive potential of the supply voltage source, is controlled to be periodically conductive during a predeterminable time period, and when a current flows through the capacitive actuator When the current reaches a predetermined first threshold value, it is controlled to be blocked again until the current through the actuator reaches a predetermined second threshol...
Claims
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IPC IPC(8): H02N2/06H10N30/80
CPCH02N2/06H02N2/067H10N30/802H02J7/00H02J7/345
Inventor C·哈根米勒R·L·阿利马里努托罗克E·G·卢基克
Owner VTESCO TECH GMBH