JPH04354114A - Polar capacitor circuit - Google Patents

Abstract

PURPOSE:To easily recognize the normal connection of a polar capacitor. CONSTITUTION:When a voltage is normally applied to a polar capacitor circuit 2 as shown in figure (a), a current does not flow in a diode 22, and a capacitor 21 normally achieves the function of voltage compensation. When an inverse voltage is applied to the polar capacitor circuit 2 as shown in figure (b), a current flows through the diode 22, and the circuit turns to a shorted state. Since an excessive current flows in the diode 22 when the circuit turns to the shorted state, a fuse 23 is blown out. By confirming the fuse 23 at this time, it can be recognized whether the polar capacitor circuit 2 is normally connected.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a circuit for ensuring normal connection of polar capacitors used in smoothing circuits, filtering circuits, etc.

0002

[Prior Art] Conventionally, this type of polar capacitor has been used by being inserted in parallel between a power supply and a load in order to suppress noise and voltage fluctuations. No particular consideration was given to a circuit to compensate for this.

0003

[Problems to be Solved by the Invention] The above-mentioned conventional polarized capacitors do not cause fixed and significant abnormal phenomena in the circuit if the polarity is connected incorrectly, but rather cause intermittent unstable phenomena that are difficult to debug. It had the disadvantage of causing Furthermore, this polar capacitor also had the risk of bursting and burning due to reverse voltage.

0004

[Means for Solving the Problems] A first invention provides a polar capacitor circuit including a capacitor for storing electric charge, which is connected in parallel to the capacitor, and bypasses current when a reverse voltage is applied to the capacitor. It consists of a diode and a fuse that is connected in series with the capacitor and is cut off when an overcurrent of the bypass flows through the diode.

[0005]

Embodiments Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is an explanatory diagram of circuit operation showing one embodiment of the present invention.

FIG. 1 shows a polar capacitor circuit 2 of the present invention.
, a DC power supply 1, and a load 3 such as an amplifier circuit.

The DC power supply 1 is a voltage source that supplies DC voltage to the load 3. The load 3 is a circuit that performs an operation such as amplification when a voltage is applied from the DC power supply 1. The polar capacitor circuit 2 of the present invention is inserted to suppress voltage fluctuations due to noise or load fluctuations.

As shown in FIG. 1(a), when a voltage is correctly applied to the polar capacitor circuit 2, no current flows through the diode 22, and the capacitor 21 normally performs the voltage compensation function. However, when a reverse voltage is applied to the polar capacitor circuit 2 as shown in FIG. 1(b), current flows through the diode 22 and the circuit becomes short-circuited. When the circuit becomes short-circuited, an overcurrent flows through the diode 22 and the fuse 23 is cut off. That is, polar capacitor circuit 2
will be disconnected from the circuit. At this time, by checking the fuse 23, it is easily recognized that the polar capacitor circuit 2 is not connected correctly.

0010

[Effects of the Invention] As explained above, in the polar capacitor circuit of the present invention, by adding a diode and a fuse to the polar capacitor, it can be easily recognized that the polar capacitor circuit 2 is correctly connected. effective. Furthermore, it has the effect of preventing the polarized capacitor from bursting and burning.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram of circuit operation showing an embodiment of the present invention.

[Explanation of symbols]

1 DC power supply 2 Polar capacitor circuit 3 Load 21 Capacitor 22 Diode 23 Fuse

Claims (1)

[Claims] 1. A polar capacitor circuit comprising: a capacitor for storing electric charge; a diode connected in parallel to the capacitor to bypass current when a reverse voltage is applied to the capacitor; and a diode connected in series to the capacitor. A polar capacitor circuit comprising a fuse that is cut when an overcurrent of the bypass flows through the diode.