A breaking device and inverter system
A breaking device and breaking unit technology, applied in the direction of automatic disconnection emergency protection device, circuit device, emergency protection circuit device, etc., can solve the problem of shortening the service life of the fuse, affecting the reliability of the breaking device, and low reliability of the breaking device question
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example 1
[0096] see Figure 6 , is a breaking device provided in the embodiment of this application. The breaking device is connected in series between the DC input terminal and the protected circuit. When the protected circuit fails, the breaking device disconnects the electrical connection between the DC input terminal and the protected circuit.
[0097] Figure 6 The breaking device shown includes a fuse, a current limiting resistor, a relay, and a controller. Among them, the fuse and the current-limiting resistor are connected in parallel with the relay after being connected in series; the controller is used to control the pull-in or disconnection of the relay.
[0098] Figure 6 The working principle of the breaking device shown is as follows: during normal operation, the controller controls the relay to pull in, and the current is shunted through the two branches of the series branch of the fuse and the current limiting resistor and the relay branch. The impedance of the resi...
example 2
[0107] see Figure 7 , is a breaking device provided in the embodiment of this application. The breaking device is connected in series between the DC input terminal and the protected circuit. When the protected circuit fails, the breaking device disconnects the electrical connection between the DC input terminal and the protected circuit.
[0108] Figure 7 The breaking device shown includes fuses, diodes, relays and controls. Among them, after the fuse and the diode are connected in series, they are connected in parallel with the relay; the controller is used to control the pull-in or disconnection of the relay.
[0109] Figure 7The working principle of the breaking device shown is as follows: during normal operation, the controller controls the relay to pull in, and the current is shunted through the two branches of the series branch of the fuse and the diode and the branch of the relay. The conduction voltage drop acts on the relay branch. At this time, most of the cur...
example 3
[0118] see Figure 8 , is a breaking device provided in the embodiment of this application. The breaking device is connected in series between the DC input terminal and the protected circuit. When the protected circuit fails, the breaking device disconnects the electrical connection between the DC input terminal and the protected circuit.
[0119] Figure 8 The breaking device shown includes a fuse, an oxide film removal circuit, a first relay, a controller, and a first current limiting resistor. The oxide film removal circuit is composed of a second relay and a second current limiting resistor connected in parallel, and the second relay is a normally closed relay. Wherein, the fuse, the first current limiting resistor, and the oxide film removal circuit are connected in parallel with the first relay after being connected in series; the controller is used to control the first relay to be turned on or off, and the second relay to be turned on or off.
[0120] Wherein, the de...
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