JPH0449395A - Electrically-driven blind - Google Patents

Abstract

PURPOSE:Not to necessitate an encoder system and to facilitate control and application by controlling an AC motor by means of a microcomputer equipped in an electrically driven blind,and performing the lifting adjustment and the open and close angle adjustment of slats. CONSTITUTION:Slats of a blind are moved up and down and opened and closed by the revolution of the rotary shaft with an AC motor and further control of the AC motor is performed by a microcomputer having a conversion circuit to compose an electrically driven blind. Next, a certain interval of time is made to be pulses by use of the conversion circuit generating pulses every certain quantity by counting AC cycles of the distributed wires and the time converted into pulses is input into the microcomputer circuit to regulate the revolution of the rotary shaft of the AC motor by the time passed. In this way, the lifting and opening angle of the slats can be freely adjusted.

Description

[Detailed description of the invention] ■)...Industrial application field and characteristics of the present invention The present invention is
It relates to an electric blind in which an AC motor rotates a rotating shaft to lift, lower, open and close the slats, and the AC motor is controlled by a microcomputer with a frequency dividing circuit. The first feature is that it can be used as a frequency divider circuit, and it also counts the AC cycles of the power distribution line (e.g., Kanto 50C/S, Kansai 60C/S) and generates pulses every certain amount (at every certain time). pulse for a certain period of time (a certain number of cycles) (e.g., 50
The second feature is that the C/S is divided into halves, 25 cycles are treated as 1 pulse, and 1 second = 1 rotation of the AC motor is made into 2 pulses), and the time is pulsed in this way. This is input into the microcomputer circuit, and the microcomputer temporally controls the rotation of the rotating shaft of the AC motor based on this pulsed time, thereby adjusting the slur/t's elevation RtJR node and opening/closing angle!
! This relates to an electric blind that can be freely adjusted.

■)...Problems with conventional technology (1)...For conventional electric blinds, for example,
The slats are raised, lowered, opened and closed by the rotation of a DC motor,
The DC motor is controlled by a photo encoder system (
(2) This required a photo encoder system as described above (not necessary in the present invention). The photo encoder system consists of a disc with a slit and a light-emitting diode installed coaxially on the rotating shaft rotated by the DC motor of each blind, and a microcomputer converts the constant number of times the slit is blocked by the rotation of the disc into pulses. -, the rotation of the DC motor is controlled by the pulse signal from the microcomputer, and the slat is raised.
The if clause and opening/closing angle are adjusted.

(3)...However, this has the advantage that it is inexpensive because it uses a DC motor (in the present invention it is always an AC motor) and can be used anywhere without regional differences (for example, Kanto 507, Kansai 60 old, etc.) On the other hand, the rotational speed of each DC motor is not necessarily constant, but is uniform (it is constant for AC motors), but if the size, weight, etc. of each blind differ, the load on the motor will differ, and the slats of each blind The lift position and opening/closing angle of the blinds are different, resulting in unevenness as a whole. This has been viewed as a serious defect in some cases.

■)...This invention The present invention solves the above-mentioned conventional problems.

(1)... That is, the present invention is an electric blind equipped with an AC motor that rotates a rotating shaft to raise/lower and open/close the slats, and a microcomputer that controls the cough AC motor. - has a frequency divider circuit that counts the alternating current cycles of the distribution line and generates pulses every fixed amount (every fixed time). A microcomputer controls the AC motor based on the pulsed time input, and the microcomputer controls the AC motor, that is, controls the rotation of the rotating shaft over time to adjust the elevation of the slant and control the AC motor. This is an electric blind that allows you to adjust the opening and closing angle.

■)...Effects (1)...We use an AC motor and control the AC motor by converting the time into pulses using a microcombinator with a frequency dividing circuit. is not necessary, which is advantageous in terms of cost and space.

(2)... By using an AC motor and frequency dividing circuit as described above, it is possible to pulse the time and control the rotation of the rotating shaft over time, so it is possible to control the rotation of the rotating shaft over time. Elevate and lower the slats evenly regardless of the situation!
The I11 section and the opening/closing angle can be adjusted, and the above-mentioned conventional defects can be solved.

(3) Because it is an alternating current system, it can be synchronized with other electric blinds that use non-computerized AC motors, making it easy to install on site.

(4)...On the other hand, since the motor is AC and has less torque than DC, it also has the disadvantage of increasing the cost of the motor.

[Brief explanation of the drawing]

FIG. 1 is a schematic block diagram of one embodiment of the present invention.

Claims (1)

[Claims] (1) An electric blind equipped with an AC motor that rotates a rotating shaft to raise, lower, open and close the slats, and a microcomputer that controls the AC motor, and the microcomputer controls the AC cycle of the power distribution line. It has a frequency divider circuit that counts and generates a pulse every fixed amount (at every fixed time), and the time pulsed by this frequency divider circuit is input to the microcomputer circuit, and the pulsed time is input to the microcomputer circuit. An electric blind in which the AC motor is controlled by the microcomputer (i.e., the temporal rotation control of the rotating shaft), and the lifting and lowering of the slats and the opening/closing angle are adjusted.