This document summarizes the components, specifications, and performance of a DC motor. It includes: - The motor part number, manufacturer, and specifications for frequency adjustment range and characteristics. - Circuit simulation results showing the voltage and current characteristics of the motor at no load and fan load. - Diagrams of the evaluation circuits used to test the motor's performance under different loads. - References to optimize simulations and understand voltage and current characteristics under different operating conditions.

1. Device Modeling Report
COMPONENTS: DC MOTOR
PART NUMBER: RE-140
MANUFACTURER: MABUCHI MOTOR
Bee Technologies Inc.
All Rights Reserved Copyright (c) Bee Technologies Inc. 2005

2. Theory: Auto Balancing Bridge Method
Optimization of Simulation
Range of adjustment Frequency:40 to10K(Hz)
Frequency vs.|Z| and Frequency vs.θz Characteristic
Attention)
Please use SPICE MODEL within the range from 40 to 10K(Hz) for best accuracy.
LM
RS
CP
All Rights Reserved Copyright (c) Bee Technologies Inc. 2005

3. DC Motor Voltage and Current Characteristics at Noload
Circuit simulation result
2.5
2.0
1.5
1.0
0.5
0
-0.5
-1.0
-1.5
-0.1s 0s 0.1s 0.2s 0.3s 0.4s 0.6s 0.7s 0.8s 1.0s
I(V2) V1(X_U1.E_E_EMF)
Time
Evaluation circuit
V2
0Vdc
U1
+ RE-140
V1 - IL = {IL}
1.5Vdc
0
All Rights Reserved Copyright (c) Bee Technologies Inc. 2005

4. DC Motor Voltage and Current Characteristics (No load) Reference
All Rights Reserved Copyright (c) Bee Technologies Inc. 2005

5. DC Motor Voltage and Current Characteristics at Fan load
Circuit simulation result
2.5
2.0
1.5
1.0
0.5
0
-0.5
-1.0
-1.5
-0.1s 0s 0.1s 0.2s 0.3s 0.4s 0.6s 0.7s 0.8s 1.0s
I(V2) V1(X_U1.E_E_EMF)
Time
Evaluation circuit
V2
0Vdc
U1
+ RE-140
V1 - IL = 650m
1.5Vdc
0
All Rights Reserved Copyright (c) Bee Technologies Inc. 2005

6. DC Motor Voltage and Current Characteristics (Fan load) Reference
All Rights Reserved Copyright (c) Bee Technologies Inc. 2005