OMNIREL OMC507 Datasheet

OMC507

205 Crawford Street, Leominster, MA 01453 USA [phone] FAX [phone]
Visit Our Web Site at www.omnirel.com

FULL-FEATURED CIRCUIT BOARD ASSEMBLY FOR
DIRECT DRIVE OF 3-PHASE BRUSHLESS DC MOTOR S

5 Amp. Push-Pull 3-Phase Brushless
DC Motor Controller/Driver Circuit Board

FEATURES

• Fully integrated 3-Phase Brushless DC Motor Control System

• 5A Average Phase Current (10A peak) with 30V Maximum Bus Voltage

• Onboard Current Sense Resistor

• Direction and Torque Control

• Tachometer Output

• Fits Inside Motor Housing

APPLICATIONS

• Fans and Pumps

• Hoists

• Actuator Systems

DESCRIPTION

The OMC507 is a three phase brushless DC Motor Controller Driver. The OMC507 is a 2
quadrant controller and provides control of motor current (torque) in proportion to the input
current command. The versatility of the OMC507 allows the user to either provide an analog
or a TTL PWM current command signal externally, or to set an analog current command
onboard. The OMC507 also allows the user to adjust the current command offset onboard
through the use of a potentiometer. Loop compensation is provided onboard and loop
compensation component values can be modified to meet specific customer requirements,
thereby optimizing the controller for each application.

The OMC507 controller utilizes surface mount and through hole technology. The OMC507
is a mere 2 1/2 inches in diameter and can fit inside the motor housing. A connector for the
control section is optional; consult the factory.

9 04 R0

OMC507

Vcc (1)

Ground (2)

Command (5)

+5V

+5V_Hall (6)

Hall_A (8)
Hall_B (9)
Hall_C (10)
Direction (11)

Enable (12)

Tach_Out (13)

V_Motor

Phase_A

Phase_B

Phase_C

Monitor (14)

Vcc

VREF

VREF

Tach_OutTach_Out

Vcc

Bus

Bus

Bus

Bus

VREF

U1
UC3625

25
15

1
27
26
28

2

8

9
10

6
21
22
23

19

11

24

18

16

17

12

13

14

4

5

7

3

20

RC_OSC
GND
E/A_IN(+)
E/A_OUT
PWM_IN
E/A_IN(-)
VREF
H1
H2
H3
DIR
RC_BRAKE
QUAD_SEL
OV_COAST

VCC

PWR_VCC

SSTART

PUA

PUC

PUB

PDC

PDB

PDA

ISENSE_1
ISENSE_2
SPEED_IN

ISENSE

TACH_OUT

R_Sense

C_Bus
10uF

R/C

Compensation
Network

R/C

Voltage
Regulator

Enable

Level
Shift

Level
Shift

Level
Shift

Filter

Circuit

Offset
AdjustSet/Adjust

Command

SIMPLIFIED BLOCK DIAGRAM

COMMUTATION TRUTH TABLE

This table shows the Phase Output state versus
the state of the Hall-Effect and Direction Inputs.
Please note that the Hall-Effect Inputs are
Grey-encoded; that is, only one input is allowed
to change from one input state to another at a
time.

The commutation coding shown reflects Hall­Effect sensors that are spaced at 120
mechanical increments. Also, internal
protection logic disables all three Phase
Outputs when the Hall-Effect Inputs are set to
an illegal condition (i.e. all logic low or all logic
high).

2.1 - 2

DIGITAL INPUTS PHASE OUTPUTS

DirH1 H2H3 A B C

1 0 0 1 Hi-Z Sink Source
1 0 1 1 Sink Hi-Z Source
1 0 1 0 Sink Source Hi-Z
1 1 1 0 Hi-Z Source Sink
1 1 0 0 Source Hi-Z Sink
1 1 0 1 Source Sink Hi-Z
0 1 0 1 Sink Source Hi-Z
0 1 0 0 Sink Hi-Z Source
0 1 1 0 Hi-Z Sink Source
0 0 1 0 Source Sink Hi-Z
0 0 1 1 Source Hi-Z Sink
0 0 0 1 Hi-Z Source Sink
X 0 0 0 Hi-Z Hi-Z Hi-Z
X 1 1 1 Hi-Z Hi-Z Hi-Z

OMC507

ABSOLUTE MAXIMUM RATINGS

Motor Supply Voltage, Vm................................................... 30 Vdc

Peak Motor Supply Voltage V
A verage Phase Output Current, I

Peak Phase Output Current, I
Control Supply Voltage, V
Logic Input Voltage

cc

(Note 1) ............................................ -0.3 V to +6 V

Reference Source Current ................................................ -30 mAdc

Command Input Voltage Range, ....................................... -0.3 V to +6 V

Current Sense Amplifier Input Voltage (ISH/ISL) ....................... -0.3 V to +6 Vdc

Tachometer Output Current ................................................ ±10 mAdc

Operating Ambient Temperature ....................................... 0° C t o +85° C

Operating Junction Temperature ...................................... 0° C to +120° C

Storage Temperature Range ........................................ -20° C to +120° C

Power Switch Junction-to-Ambient Thermal Resistance, RqjA................... 62.5°C/W

............................................. 50 Vdc

m pK

@ TA = +25° C........................ 5 Amperes DC

o

I

@ TA = +85° C ....................... 3 Amperes DC

o

@ TA = +25° C...................... 10 Amperes Peak*

o pk

................................................... +18 V

*Maximum pulse width = 10 Sec

RECOMMENDED OPERATING CONDITIONS (T

Motor Power Supply Voltage, V
A verage Phase Output Current, I
Control Supply Voltage, V

cc

Logic Low Input Voltage, V
Logic High Input Voltage, V

Note 1: Logic Inputs: Direction, Hall Inputs (Hall_A...Hall_C), and Enable.
Note 2: Onboard current sense resistor; 20 m (nominal), 2W.

........................................... + 2 8 Vdc

m

(Note 2)

O

......................................... 5 A

............................................ 15Vdc ±10%

........................................... 0.8 Vdc (max)

il

........................................... 2.0 Vdc (min)

ih

= 25° C)

A

2.1 - 3