Explanation) For driving method of the stepping motor, send signals in the cycle of 3.33 mSEC using terminal of MICOM
PIN 33, 34 and 35 as shown in wave form of the following part.
These signals are output to the output terminal (No.10, 11, 14, 15) via the input terminal (No. 3, 6, 8) of the
IC10 (TA7774F) as IC for motor driving. Output signals allow motor coils wound on each phase of stator to
form rotation magnetic field and the motor to rotate. Inputting as below figure to the input terminal (INA, INB)
as IC (TA7774AF) for motor driving allows motor coils wound on each phase of stator to form rotation
magnetic field and the stepping motor damper to rotate
EXPL A TION FOR MICOM CIRCUIT
- 18-
(Reverse rotation) (Positive rotation)
1-8. Temperature compensation and over-cool/weak- cool compensation circuit
1. Temperature compensation at freezing room, cold storage room
冷藏室温度补偿
冷冻室温度补偿
Freezing room
Temperature
compensation
Temperature
compensation
Refrigerator room
Resistance value
(RC F 1
）
Resistance value
(RC F 1
）
Remarks
Reference temperature
Warmly
compensate
Coolly
compensate
180 kΩ
+5 °C
180 k
Ω
+2.5 °C
56 kΩ
+4 °C
56 k
Ω
+2.0 °C
33 kΩ
+3 °C
33 k
Ω
+1.5 °C
18 kΩ
+2 °C
18 k
Ω
+1.0 °C
12 kΩ
+1 °C
12 k
Ω
+0.5 °C
10 kΩ
0 °C
10 k
Ω
0 °C
8.2 kΩ
-1 °C
8.2 k
Ω
-0.5 °C
5.6 kΩ
-2 °C
5.6 k
Ω
-1.0 °C
3.3 kΩ
-3 °C
3.3 k
Ω
-1.5 °C
2 kΩ
-4 °C
2 k
Ω
-2.0 °C
470Ω
-5 °C
470
Ω
-2.5 °C
Temperature compensation table by adjustment value (difference value against current temperature)
Ex) If changing compensation resistance at a cold storage room (RCR1) from 10 kΩ (current resistance) to 18 kΩ
(modified resistance), temperature at the cold storage will increase by +1°C.
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