1. © 2012 MITSUBISHI HEAVY INDUSTRIES – MAHAJAK AIR CONDITIONERS CO., LTD. All Rights Reserved. 31 July 2014 AC-DC MOTOR Structure and checking

2. © 2012 MITSUBISHI HEAVY INDUSTRIES – MAHAJAK AIR CONDITIONERS CO., LTD. All Rights Reserved. AC Motor Structure OUTDOOR MOTOR INDOOR MOTOR Field Coil Pole Core Pole Shoes End Plate Shaft Ball Bearing Frame Squirrel cage Rotor Stator

3. © 2012 MITSUBISHI HEAVY INDUSTRIES – MAHAJAK AIR CONDITIONERS CO., LTD. All Rights Reserved. AC Motor structure AC motor (1) Current goes through the coil on the stator and rotating magnetic field is generated (2) Being induced by the rotating magnetic field, induced current is generated on the Squirrel Cage. (3) According to the interaction force between current and magnetic field (Fleming left hand’s law), the Cage on which the induced current goes through turns around. (1) (2) (3) Stator Coil Rotor Rotating magnetic field Current (input from power source) Induced current Advantage Simple structure Easy to control induction current is generated on the cage according to the rotating magnetic field, so the rotor will be driven accordingly without detecting rotor position Disadvantage Less efficiency caused by > Induction current loss > Motor slip

4. © 2012 MITSUBISHI HEAVY INDUSTRIES – MAHAJAK AIR CONDITIONERS CO., LTD. All Rights Reserved. AC Motor checking Reference value of AC motor’s coil resistance INDOOR MOTOR SRK10CNV, 13CNV SRK10CNS, 13CNS SRK10CNS-2, 13CNS-2 Wiring Color CodeOhm (Ω) Brown - Red (R - C)200 Ω White - Red (S - C)300 Ω Brown - White (R - S)500 Ω BR

5. © 2012 MITSUBISHI HEAVY INDUSTRIES – MAHAJAK AIR CONDITIONERS CO., LTD. All Rights Reserved. AC Motor checking Reference value of AC motor’s coil resistance Wiring Color CodeOhm (Ω) Orange - Black (R - C)200 Ω White - Black (S - C)300 Ω Orange - White (R - S)500 Ω OUTDOOR MOTOR SRC10CNV, 13CNV SRC10CNS, 13CNS SRC10CNS-2, 13CNS-2

6. © 2012 MITSUBISHI HEAVY INDUSTRIES – MAHAJAK AIR CONDITIONERS CO., LTD. All Rights Reserved. AC Motor checking Reference value of AC motor’s coil resistance Wiring Color CodeOhm (Ω) Red - Black (R - C)100 Ω White - Black (S - C)200 Ω Red - White (R - S)300 Ω OUTDOOR MOTOR SRC19CNS, 25CNS

7. © 2012 MITSUBISHI HEAVY INDUSTRIES – MAHAJAK AIR CONDITIONERS CO., LTD. All Rights Reserved. DC Motor structure OUTDOOR MOTOR INDOOR MOTOR Frame Permanent Magnet Rotor End Plate Shaft Ball Bearing Pole Core File Coil PCB Pole Shoes

8. © 2012 MITSUBISHI HEAVY INDUSTRIES – MAHAJAK AIR CONDITIONERS CO., LTD. All Rights Reserved. DC Motor structure Advantage Less loss and better efficiency than AC motor because of > no motor slip > no induced current loss Disadvantage Need enough knowledge to drive Rotor position needs to be detected anytime to drive it and stator coil should be energized accordingly to the rotor position DC motor (1) Current goes through the coil on the stator and rotating magnetic field is generated (same as AC) NS NS (2) By the interaction of the pole of magnet, rotor will turn around. Rotor Stator

9. © 2012 MITSUBISHI HEAVY INDUSTRIES – MAHAJAK AIR CONDITIONERS CO., LTD. All Rights Reserved. DC Motor diagram

10. © 2012 MITSUBISHI HEAVY INDUSTRIES – MAHAJAK AIR CONDITIONERS CO., LTD. All Rights Reserved. DC Motor checking Wiring Color CodeOhm (Ω) Red - Black (Vm - Gnd)> 1 MΩ White - Black (Vcc - Gnd) > 25 kΩ Yellow - Black (Vsp - Gnd) > 200 kΩ Reference value of DC motor resistance INDOOR MOTOR SRK19CNS, 25CNS SRK10YLV-S, 13YLV-S Vm Gnd Vcc Vsp FG

11. © 2012 MITSUBISHI HEAVY INDUSTRIES – MAHAJAK AIR CONDITIONERS CO., LTD. All Rights Reserved. DC Motor checking Wiring Color CodeOhm (Ω) Red - Black (Vm - Gnd)> 1 MΩ White - Black (Vcc - Gnd) > 25 kΩ Yellow - Black (Vsp - Gnd) > 150 kΩ Reference value of DC motor resistance OUTDOOR MOTOR SRC10YLV-S, 13YLV-S

12. © 2012 MITSUBISHI HEAVY INDUSTRIES – MAHAJAK AIR CONDITIONERS CO., LTD. All Rights Reserved. EEV Motor structure

13. © 2012 MITSUBISHI HEAVY INDUSTRIES – MAHAJAK AIR CONDITIONERS CO., LTD. All Rights Reserved. EEV Motor Diagram N S Tr1 Tr2 Tr3 Tr4 L1 L2 L3 L4 Stator Rotor ① At first, when the transistor Tr1 was turned on, the electric current generates the S pole in magnet rotor side of coil L1. ② Because the N pole of the rotor is pulled to the S pole of the coil, a rotor turns. ③ Next, when the transistor Tr2 was turned on, the electric current generates the S pole in the magnet rotor side of coil L2. ④ The rotor turns by repeating above movement. ⑤ Because a rotor turns, a needle valve works up and down and regulates a valve and gap with the main body.

14. © 2012 MITSUBISHI HEAVY INDUSTRIES – MAHAJAK AIR CONDITIONERS CO., LTD. All Rights Reserved. EEV coil checking Wiring Color CodeOhm (Ω) White - Red45 to 50 Ohm Red - Orange45 to 50 Ohm Orange - White90 to 100 Ohm Yellow - Red45 to 50 Ohm Red - Blue45 to 50 Ohm Blue - Yellow90 to 100 Ohm OUTDOOR EEV SRC19CNS, 25CNS SRC10YL-S, 13YL-S

15. © 2012 MITSUBISHI HEAVY INDUSTRIES – MAHAJAK AIR CONDITIONERS CO., LTD. All Rights Reserved.