JPS6377176U

JPS6377176U -

Info

Publication number: JPS6377176U
Application number: JP17207286U
Authority: JP
Priority date: 1986-11-10
Filing date: 1986-11-10
Publication date: 1988-05-23

Description

[Brief explanation of drawings]

第１図乃至第５図は本考案の第１の実施例を示
すもので、第１図は電気的構成を示す結線図、第
２図は第１図中の各部出力波形図、第３図は零ク
ロス検出回路及びこれに関連した部分の具体的構
成を示す結線図、第４図は第３図中の各部出力波
形図、第５図は電動バルブの外観を示す側面図で
ある。また、第６図乃至第８図は本考案の第２の
実施例を示すもので、第６図は第１図相当図、第
７図は第２図相当図、第８図は制御回路による制
御内容を示すフローチヤートである。図中、１は電動バルブ、２は電動機、３はバル
ブ本体、４は交流電源、７は零クロス検出回路、
１６，２４は制御回路、２２，２３はトライアツ
ク（制御極付き半導体スイツチング素子）を示す
。 Figures 1 to 5 show the first embodiment of the present invention, where Figure 1 is a wiring diagram showing the electrical configuration, Figure 2 is an output waveform diagram of each part in Figure 1, and Figure 3 is a diagram showing the output waveforms of each part in Figure 1. 4 is a wiring diagram showing the specific configuration of the zero cross detection circuit and parts related thereto, FIG. 4 is an output waveform diagram of each part in FIG. 3, and FIG. 5 is a side view showing the appearance of the electric valve. 6 to 8 show a second embodiment of the present invention. FIG. 6 is a diagram corresponding to FIG. 1, FIG. 7 is a diagram equivalent to FIG. 2, and FIG. 8 is a diagram corresponding to a control circuit. It is a flowchart showing control contents. In the figure, 1 is an electric valve, 2 is an electric motor, 3 is a valve body, 4 is an AC power supply, 7 is a zero cross detection circuit,
Reference numerals 16 and 24 indicate control circuits, and 22 and 23 indicate triacs (semiconductor switching elements with control poles).

Claims

[Claims for Utility Model Registration] 1. A drive circuit for an electric valve whose drive source is an electric motor that rotates at a speed synchronized with a power supply frequency, which comprises a switching element for rotating the electric motor in forward and reverse directions, and a switching element for rotating the electric motor in the forward and reverse directions, a pulse generating circuit that generates detection pulses synchronized with the switching element; 1. A drive circuit for an electric valve, comprising a control circuit for selectively rotating the valve. 2. The pulse generation circuit is constituted by a zero cross detection circuit that generates a detection pulse every time the power supply voltage crosses the atmosphere voltage, and the switching element is constituted by a semiconductor switching element with a control pole, and the control circuit is configured by the above-mentioned switching element. The electric valve drive circuit according to claim 1, wherein the electric valve drive circuit is configured to intermittently trigger the element at a predetermined period corresponding to the output period of the detection pulse.