Schneider Electric 58 TRX

Altivar® 58 TRX AC Drives

Power Section Construction Information

Block Diagram ATV58HD16M2 to ATV58HD46M2 (15 to 40 hp/50 hp VT 208/230 Vac) and

ATV58HD28N4 to ATV58HD79N4 (25 to 75 hp/100 hp VT 400/460 Vac)

The block diagram above provides an overview of the construction of the ATV58 TRX drive controller

power section. The drive controllers in the horsepowe r ranges ref erenced abov e ar e bui lt in fr ame siz es

6 and 7. (See the dimensional drawings on pages 120 to 122.) These two frame sizes share many

components and technological advances:

• The option of having an input EMC filter mounted integrally in the product.

• An internally-mounted 3-phase line reactor.

• The diode bridge section consists of three modules each containing a diode and a thyristor. This

advanced diode/thyristor module is ASIC-controlled to gate on the thyristor to charge the DC bus

when power is initially applied to the unit. Once the DC bus is charged, the thyristor is gated on full

time and acts as a diode. This technological advance allows for el iminatio n of the electromec hanical

precharge relay. This improves product reliability and allows for reduced package size.

• The dynamic braking components are incorporated into one module, internally mounted in the

product.

• The output section consists of six insulated gate bipolar tra nsistors (IGB Ts) integr ated into the powe r

module (PM). Frame size 6 integrates the six IGBTs into one power module, while frame size 7

contains three power modules with two integrated IGBTs each.

• Three current sensors are used on the output to monitor the current supplied to the motor. The

feedback from these sensors is used by the motor control algorithms.

Integration reduces the part count and the wiring and connection points required to connect

components. The power modules provide further integration by combining fault detection and short

circuit protection of the output transistors. The use of power modules also eliminates individual gate

drive cards and associated wiring used by most other manuf acturers in this horsep ower range . The drive

also incorporates a laminated bus network of power conductors for line, DC b us , and mo tor po w er with

connections made with screws instead of traditional cable connectors. These factors combine to make

the product fit in a smaller package while improving the reliability of the product.

−

Optional

EMC

Filter

DBT

Diode

Bridge

Section

Capacitor

Bank Dynamic

Braking

Transistor

3-Phase Current

Measurement

IGBT

Output

Section

Integrated

3-Phase

Line Reactor

BlkDiag2.eps