This document summarizes a DC motor simulation using PSpice. It includes: 1) A circuit diagram of the DC motor simulation replacing components with Bee Technologies models and setting the power supply to 12V. 2) A measurement circuit diagram for breadboard testing. 3) Graphs of the simulation results showing the collector current of transistor QTR9 and the motor voltage varying over time.

1. DC Motor Simulation using PSpice
18JUN2020
Tsuyoshi Horigome
1

2. R158
7.2k
QTR1
Q2SA1020_Y
R150
1k
V3
TD = 10m
TF = 0.01u
PW = 50m
PER = 100m
V1 = 5
TR = 0.01u
V2 = 0
V2
TRAN =
DC = 12
0
QTR9
Q2SC2655
U5
D1SR139-400
R157
220
+
-
U1
RS-380PH
IL = 0.6
C129
0.1u
C130
0.1u
R12
2.2k
R124
1.6k
U6
D1SR139-400
R151
3k
U4
D1SR139-400
R159
2.7k
R149
1k
U7
D1SR139-400
Simulation Circuit
 (2SA1020, 2SC2655, and 1SR139-400 are replaced with Bee Technologies Model)
 1SR139-400 is Professional Model
V2=12V
2

3. Measurement Circuit
 Breadboard testing
3

4. Simulation Result (TR9 Collector Current)
Time
80.0ms 100.0ms 140.0ms 180.0ms 220.0ms 260.0ms
1 IC(QTR9) 2 V1(X_U1.E_E_EMF) V(V3:+)
-2.0A
-1.0A
0A
1.0A
2.0A
3.0A
4.0A
5.0A
6.0A
1
-8.0V
-6.0V
-4.0V
-2.0V
0V
2.0V
4.0V
6.0V
8.0V
2
>>
IC(TR9)
REM pulse
Motor
Voltage
IC(TR9)
REM pulse
Motor
Voltage
4

5. Time
80.0ms 100.0ms 140.0ms 180.0ms 220.0ms 260.0ms
1 I(X_U1.V_VSENSE) 2 V1(X_U1.E_E_EMF) V(V3:+)
-2.0A
-1.0A
0A
1.0A
2.0A
3.0A
4.0A
5.0A
6.0A
1
-8.0V
-6.0V
-4.0V
-2.0V
0V
2.0V
4.0V
6.0V
8.0V
2
>>
Simulation Result (TR9 Collector Current)
Motor Current
REM pulse
Motor
Voltage
REM pulse
Motor
Voltage
Motor Current
5

6. Simulation Circuit
 (2SA1020, 2SC2655, and 1SR139-400 are replaced with Bee Technologies Model)
V2=24V
C130
0.1u
U7
D1SR139-400
R157
220
R151
3k
R149
1k
R159
2.7k
U6
D1SR139-400
QTR9
Q2SC2655
C129
0.1u
V3
TD = 10m
TF = 0.01u
PW = 50m
PER = 100m
V1 = 5
TR = 0.01u
V2 = 0
0
U5
D1SR139-400
R124
1.6k
R12
2.2k
V2
TRAN =
DC = 24
U4
D1SR139-400
QTR1
Q2SA1020_Y
+
-
U1
RS-380PH
IL = 0.6
R150
1k
R158
7.2k
6

7. Time
80ms 100ms 120ms 140ms 160ms 180ms 200ms 220ms 240ms 260ms
1 I(X_U1.V_VSENSE) IC(QTR9) 2 V1(X_U1.E_E_EMF) V(V3:+)
-2.0A
-1.0A
0A
1.0A
2.0A
3.0A
4.0A
5.0A
6.0A
1
>>
-8.0V
-6.0V
-4.0V
-2.0V
0V
2.0V
4.0V
6.0V
8.0V
2
Simulation Result (TR9 Collector Current, and
Motor Current)
IC(TR9)
REM pulse
Motor
Voltage
Motor
Current
7