EPC EP-2000 Product manual

EPC
DC Motor Speed Control
TECHNICAL
REFERENCE MANUAL

This manual covers the following EPC controllers:
□EP-2000
□EP-1000
□EP-Junior
□NEV Controller

INTRODUCTION
The EP-Series of motor controllers are suitable for most industrial, automotive, and
marine applications. They are designed to drive most brushed DC motors, including
series-wound, separately excited, and permanent magnet motors. Separately Excited
motors may require additional hardware, based on the application.
All EP-Series controllers come configured to run off any DC power source, and can also
be run from single-phase and three-phase AC power sources with our optional AC
Module.
All EPC controllers are designed to operate in harsh industrial environments. Installation
is residential environments will require that the high voltage terminals of the unit to be
shielded with a UL-Listed terminal protector or cover.
All EPC Products are
Manufactured in the
United States of America

FEATURES
•True plug-and-play design... simply connect and go!
•Half the cost of a conventional industrial/automotive controller
•Soft-start technology allows for smoother acceleration
•100% Waterproof and wet-location compliant
•No programming required
•Fanless, air-cooled design allows for a very small footprint
•Full optical isolation between high voltage and 12-volt systems
•Efficient heatsink and IGBT modules eliminate the need for liquid cooling
•Wide input voltage range: 24 to 320 volts
•Non-metallic enclosure increases safety and prevents corrosion
•All stainless steel / brass hardware included
•Energy-saving design operates at over 97% efficiency
•Brake pedal input for additional safety in the event of throttle bind / failure
•Built-in contactor delay allows you to turn on the contactors and controller at the
same time, without the possibility of damaging components
All EPC controllers will automatically detect your motor type, battery pack voltage, and
potentiometer range. Programming is not necessary, except in rare cases where the
equipment is being operated outside its normal range. In those cases, the processor will
have to be replaced as outlined in the next few sections.
All EPC controllers use a standard 6-pin wiring harness. This makes it easy to swap or
upgrade the controller, without the need to re-wire the controller.

INSTALLATION INSTRUCTIONS
A typical installation is shown below. If using an AC power source, a DC converter
module must be placed where the battery is located.
Controller can be installed in any orientation. A fan may be placed at or near the
heatsink for additional cooling, in situations where the controller is operating at maximum
or near maximum capacity most of the time.

SPECIAL NOTICE
Always verify that NO HIGH VOLTAGE POTENTIAL is present on the 12 volt
battery/power supply terminals. This can be dangerous to anyone servicing or using the
equipment.
Testing for this condition can be done as follows:
Connect a high voltage meter between each 12 volt battery terminal (or power supply)
and each high voltage battery terminal. The meter should read close to zero volts in all
cases.
For automotive applications, also check the voltage potential between the chassis/frame
of the vehicle and each high voltage battery terminal. The meter should read close to
zero volts in all cases.
If there is a high voltage leak anywhere in the system, it must be repaired immediately.
All EPC controllers are fully isolated, and cannot leak voltage into the 12-volt system.

LOW POWER TERMINAL CONNECTION
All low power connections are pre-wired into a 6-pin wiring harness (see Figure 1) for
easy installation. All EPC controllers use the same harness connector, and are
interchangeable.
Pin #1 (White Wire)
Connect to the NEGATIVE (-) of your 12 VOLT power supply or battery.
Pin #2 (Red Wire)
Connect to the POSITIVE (+) of your 12 VOLT power source. This terminal is used to turn your controller
ON. For electric vehicles, this is typically connected to the ignition switch.
Pin #3 (Blue Wire)
Brake Pedal Switch. Accepts +12V DC input to let the controller know that the brake pedal is depressed.
This instructs the processor to go down to 0% throttle, regardless of the position of the potentiometer. If
your motor is set to run continuously at idle, activating this wire will shut it down until the brake pedal is
released. Although this connection is optional, we strongly recommend using it for automotive (EV and
hybrid) applications.
Pin #4, 5, 6 (Green, Brown, and Yellow Wires)
Connect to your 3-wire potentiometer. Most standard 0-5k though 0-100k potentiometers can be used.
M = Male Pins
F = Female Pins
Figure : Controller End Wiring Harness

POTENTIOMETER CONNECTION
The EP-1000 will auto-detect any standard a 3-wire potentiometer. Any value from 0-5k
to 0-100k can be used. Reverse potentiometers (5-0k or 10-0k, for example) may also be
used, but wires number 6 and 4 must be reversed. Most two-wire potentiometers (such
as the Curtis PB-5 or PB-6) can also be used if you connect a wire from the third
(unconnected) terminal of the potentiometer to the third terminal on the EP-1000’s throttle
input (pin #6). To do this, you must first open the potentiometer’s enclosure to gain
access to the terminals and solder a wire to the unused potentiometer terminal.
All EPC brand potentiometers are 3-wire, and come with a 6-pin EPC harness pre-
installed. Due to their accuracy and high quality construction, we strongly recommend
using only EPC potentiometer units with this controller. Low quality potentiometers can
result in poor motor speed control, uneven throttle response, and often have a very short
lifespan.
Although an improperly connected potentiometer will not damage the controller itself, it
could cause the controller to apply full power to the motor. This condition will cause the
motor to operate at an unsafe speed, which could damage or even destroy the motor.
Care should be taken not to power up the controller until proper installation of the
potentiometer is verified. A diagnostic device (such as a duty cycle meter) can be used to
show power output before connecting your motor. In some cases, a dummy load (such
as a heater or light bulb) can be
used in place of the motor, as long
as the device is rated for the line
voltage that you are using.
Please call technical support at
508-923-9503 if you have difficulty
with your potentiometer
connections.

INTERNAL HARNESS CONNECTION
NOTE: Wiring harness colors may change inside of the controller, however the pin order
is always the same. Replacement wiring harnesses assemblies are available directly
from EPC.

MAIN SYSTEM BOARD
Figure 5 – Main system board. Minor components removed for clarity.
Please note that the IGBT Driver Modules are NOT replaceable. Because of the
sophisticated hardware/software protection built into these modules, module failure is
virtually impossible. In the unlikely event of a driver module failure, the module(s) must
be professionally replaced. EPC does NOT recommend replacing these modules in the
event of a failure. In such a case, the entire motherboard assembly should be replaced.
The motherboard is available as a complete replacement assembly from EPC
Corporation.
The NEV Controller, EP-Junior, and most EP-1000 controllers only contain ONE driver
module. The EP-2000, and special versions of the EP-1000 (such as the high frequency
version) use TWO driver modules.

PROCESSOR REPLACEMENT
Under normal circumstances, the main processor should never have to be replaced
unless a software update is required. The processor is pre-programmed from the factory,
and designed to outlast the equipment it operates. Processor replacement is only
required if:
•Processor Stops Functioning
•Internal Programming is Corrupt
•Equipment Requires a Software Update
The processor is installed in a 28-pin socket (8-pin for the NEV controller), and is easily
removable. When replacing the processor, BE SURE to install it with the notch (or dot)
facing the same direction. These indicators are visible in the pictures below.
AT-MEGA328 (most common) AT-Tiny85 Processor,
Processor, Found in most EPjr Found in NEV Controllers
and EP-1000 Controllers
Software updates are available from EPC Corporation, if needed. More information on
software updates is available online at www.EP- 000.com

INTERNAL COMPONENT IDENTIFICATION
EP-Junior
Figure 6 – EP-Junior Controller
Internal components of the EPjr are visible in this photograph. EMI shields, cables, and
minor components have been removed for clarity. Please note that the controller above
is a training model for service technicians; Actual production components and locations
may vary slightly. Please use the part numbers on the next two pages when servicing.

INTERNAL COMPONENT IDENTIFICATION
(CONTINUED)
Internal components for the EPjr are shown in Figure 6 of the previous page. Other than
the main processor, the internal components of these controllers are NOT user-
serviceable. The following part numbers are provided for authorized service technicians
only.
The replaceable system processor is located on the Main System Board (electronics
board). When replacing the processor, use caution not to damage the surrounding
electronic components.
REPLACEMENT PART NUMBERS
EP-Junior (Prior to 20 )
OEM PART # Description for Replacement (including limits)
PowerEx CM600HA-24A IGBT Module – 1200V / 600A
PowerEx RM300HA-24S Freewheel Diode Module - 300V / 300A
EPCOS B43991-A4208-Q1 Electrolytic Capacitor – 2000uf / 400 to 450V
TPC FSG86-9302 Film Capacitor – 100 to 200uf / 600 to 1200V
Aerovox RBPS Snubber Capacitor - 0.22 to 0.33uf / 800 to 1200V
EPC EPJR-MB Processor and Control Board for IGBT
TDK PH-FF Power Supply +20V
EPC EPJR-H2 Wiring Harness (includes bulkhead)
EP-Junior (20 - 20 4)
OEM PART # Description for Replacement (including limits)
PowerEx CM600E3U-NFH IGBT Module – 600V / 600A
EPCOS B43991-A4208-Q1 Electrolytic Capacitor – 2000uf / 400 to 450V
TPC FSG86-9302 Film Capacitor – 100 to 200uf / 600 to 1200V
Aerovox RBPS Snubber Capacitor - 0.22 to 0.33uf / 800 to 1200V
EPC EPJR-MB Processor and Control Board for IGBT
PowerEx VLA502-02 IGBT Gate Driver (mounted on EPJR-MB)
EPC EPJR-H2 Wiring Harness (includes bulkhead)

REPLACEMENT PART NUMBERS
EP- 000 (Prior to 20 0)
MANUFACTURER PART # QTY DESCRIPTION
PowerEx CM600HA-24A 2 IGBT Module
PowerEx RM400HA-24S 1 Freewheel Diode Module
EPCOS B43991-A4208-Q1 2 Electrolytic Capacitor
TPC FSG86-9302 2 Film Capacitor
Aerovox RBPS-33 2 Snubber Capacitor
TDK PH-FF 1 Power Supply
EPC EP1-MB 1 Processor and Control Board
EPC EPJR-H2 1 Wiring Harness (includes
bulkhead and connector)
EP- 000 (20 0 - 20 3)
MANUFACTURER PART # QTY DESCRIPTION
PowerEx CM600E3U-NFH 2 IGBT Module
EPCOS B43991-A4208-Q1 2 Electrolytic Capacitor
TPC FSG86-9302 2 Film Capacitor
Aerovox RBPS-33 2 Snubber Capacitor
EPC EP1-MB 1 Processor and Control Board
PowerEx VLA502-02 2 IGBT Gate Driver (on EP1-MB)
EPC EPJR-H2 1 Wiring Harness (includes
bulkhead and connector)
EP- 000 (20 4 - up)
MANUFACTURER PART # QTY DESCRIPTION
PowerEx CM1000DXL-24S 1 IGBT Module
EPCOS B43991-A4208-Q1 2 Electrolytic Capacitor
TPC FSG86-9302 2 Film Capacitor
Aerovox RBPS-33 2 Snubber Capacitor
EPC EP1-MB 1 Processor and Control Board
PowerEx VLA502-02 2 IGBT Gate Driver (on EP1-MB)
EPC EPJR-H2 1 Wiring Harness (includes
bulkhead and connector)

CONTROLLER PROTECTION
FUSE PROTECTION
Please note that a standard AC fuse should NOT be used in a DC circuit. The fuse must
be SPECIFICALLY labeled for DC applications. For most larger motor applications, a
600A fuse will be sufficient. Application-specific fuses can be ordered directly from EPC.
Also note that standard 125-volt and 240-volt DC circuit breakers (such as the AirPax
JLM-1-1RLS5-30140-200) will NOT function correctly because of the high voltage present
when the motor‘s windings are discharged during normal operation. If using a circuit
breaker, it must have a DC break rating higher than 600 volts.
NO YES NO
CONTACTORS
A pair of contactors, or some other type of high-speed mechanical disconnect should be
installed near the power supply. This not only allows for easy servicing, but can protect
the motor and controller in the event of a short or system failure. Contactors are
REQUIRED for all electric vehicles running DC motors.
Pictured is a Curtis SW-200 Contractor. Contactors should
have a continuous rating of at least 200 amps, with a surge
capacity of about 1000 for this controller. Magnetic
blowouts are required.

WET LOCATIONS
Although all EPC controllers are water resistant, care should be taken during installation
to protect any exposed high voltage terminals. The standard NEMA enclosure used for
all EPC controllers protects the internal components, and is completely sealed from the
environment.
EP- 000 / EP-2000
The EP-1000 may be briefly submersed while
running.
All external connections should be protected
from the environment by installing optional
protection boots, as shown here. These
boots are available from directly from EPC
and most other industrial component
suppliers.
EP-Junior / NEV Controller
The EP-Junior and Neighborhood
Electric Vehicle controllers come with
pre-installed motor and battery cables
for easy installation. The cables are
installed using water-tight connections,
as shown to the right.
This allows the controller to operate
while submersed, without the possibility
of voltage leaking into the water.

HEATSINK DATA
(EP-1000)
Material: Extruded Aluminum
Width: 10.000"
Length: 12.000”
Fin Height: 1.000"
Base: .300"
C/W/3": approximately 0.90
Weight per Inch: 0.48 lbs

ENCLOSURE DATA

CONTROLLER NEV EP-Junior EP-100