Sesame AC Brushless Electrical Servo Motor Drive 5C3A522A00

SESAME Motor 5C3A522A00 | 5RK90 Series Reversible AC Gear Motor — 90W Single-Phase, 4-Pole, World K Series, Made in Taiwan

Part Number: 5C3A522A00

Product Category: AC Gear Motor — Reversible Type

Series: World K Series — 5RK90 (90W, 90mm frame)

Origin: Made in Taiwan

Overview

The SESAME Motor 5C3A522A00 is a 90W single-phase reversible AC gear motor from SESAME MOTOR CORP.'s World K Series.

The 5RK90 designation identifies the core product: a 90mm frame, 90-watt, four-pole reversible motor — the highest output in SESAME's compact single-phase reversible motor line.

Reversible AC motors are built for applications that require frequent, rapid direction changes.

The motor's internal capacitor circuit is configured so the motor can instantly transition from forward to reverse without the delay or complexity of relay-switched reconnection.

Where a standard induction motor continues to coast for some time after a direction command change, the reversible motor brakes actively and re-accelerates in the opposite direction quickly. This makes the 5RK90 platform the motor of choice for conveyor reversals, shuttling mechanisms, valve actuators, positioning stages, and similar industrial automation tasks where bidirectional motion is part of the working cycle.

SESAME MOTOR CORP. has manufactured AC motors and gear motors in Taiwan since 1990. The company's World K Series follows the physical and electrical dimensions of the established industry standard for compact AC gear motors — ensuring interchangeability with compatible products from other manufacturers in the same frame class.

Certifications include CE (EMC & LVD), UL, and CCC, covering deployment in industrial markets across Asia, North America, and Europe.

Key Specifications

Reversible Motor — Design and Application Logic

Reversible motors differ from standard induction motors in their winding and capacitor arrangement. The key difference is in how forward and reverse directions are handled:

Standard induction motor. Forward and reverse are achieved by swapping two phases (3-phase) or the capacitor connection (single-phase).

Switching takes time and causes a coast-down period before the motor can re-accelerate in the opposite direction.

Reversible motor. The internal capacitor is wired so that the motor can reverse instantly.

A low-inertia rotor (typically a hollow-core design) combined with this capacitor arrangement allows near-instantaneous direction change. 

This is rated for 30-minute duty in recognition of the higher thermal load from frequent reversals.

The 5RK90 produces its rated 90W in a 90mm frame — the largest standard size in the compact World K Series.

At this output level, it delivers meaningful torque output at the motor shaft before the gearhead. With typical gear ratios from 3:1 to 200:1, the assembled gear motor covers a wide range of output shaft speeds and torque requirements.

Gearhead Compatibility

The 5RK90 motor pairs with SESAME's 5GN and 5GX series helical parallel-shaft gearheads:

5GN□KE gearhead. Standard helical gear, pinion shaft output. Gear ratios from 3:1 to 200:1 (with an intermediate decimal stage at 10:1 using the 5GN10X or 5GN10XK).

Ball bearing option available on selected ratios.

5GX□KB gearhead. Higher-precision helical gear option with ball bearing output support for increased radial and axial load capacity.

Selected when the output shaft must support significant overhung load from direct coupling to mechanism components.

The combination of motor and gearhead allows the output shaft speed and torque to be matched precisely to the application's mechanical requirements.

A 90W motor at 1500 rpm synchronous speed, through a 100:1 gearhead, produces approximately 15 rpm at the output shaft with proportionally amplified torque.

Certifications and Market Suitability

SESAME's World K Series motors carry:

CE (EMC & LVD). Compliance with European electromagnetic compatibility and low voltage directives, enabling deployment in European markets without additional approval requirements.

UL. Underwriters Laboratories recognition for the North American market.

CCC. China Compulsory Certification for the Chinese domestic market.

These certifications together cover the major industrial markets globally.

For OEM machine builders who supply machines to multiple markets, the triple-certified motor avoids the need to qualify different motors for different export destinations.

FAQ

Q1: What is the maximum allowable duty cycle for the 5RK90 reversible motor?

The 5RK90 reversible motor is rated for 30-minute operation. This means it can run continuously for up to 30 minutes under load, after which a rest period allows the windings to cool before the next operating cycle.

For applications requiring continuous-duty operation, SESAME's 5IK90 induction motor series (rated for continuous duty at the same 90W output) should be selected instead.

Reversible motors are not interchangeable with induction motors for continuous-duty applications.

Q2: Can the rotation direction be changed while the motor is running?

Yes — this is the defining capability of a reversible motor. The capacitor circuit configuration allows the motor to accept a direction-change command while rotating and respond by decelerating and re-accelerating in the opposite direction. The transition time depends on load inertia.

In practice, appropriate timing of the direction-change relay relative to the mechanical system's deceleration should be established during machine commissioning to avoid mechanical shock at direction reversal.

Q3: What gear ratio should be selected for this motor in a specific application?

Gear ratio selection depends on the required output shaft speed and the load torque. The starting point is the application's required output shaft speed. Dividing the motor's synchronous speed (1500 or 1800 rpm) by the required output speed gives the approximate gear ratio.

Next, verify that the resulting output torque (motor torque × gear ratio × efficiency) exceeds the load torque under worst-case conditions.

SESAME's product catalog provides the torque-speed curves for the 5RK90 that enable this calculation.

Q4: The motor runs warm during normal operation. Is this a sign of a problem?

Moderate warmth is normal for a reversible motor in service. The 30-minute duty rating corresponds to a defined temperature rise under rated load. If the motor is running at or below its rated load within the duty cycle, warmth to the touch is expected and not a fault indicator.

Concerning signs are: the motor is too hot to touch (suggesting overload or cooling obstruction), the motor is operated continuously beyond its 30-minute duty rating, or the motor smell suggests insulation breakdown. Mounting the motor with adequate airflow around the housing keeps operating temperature in the normal range.

Q5: How is the 5C3A522A00 part number related to the 5RK90 motor series designation?

The 5C3A522A00 is SESAME's OEM or internal ordering code that corresponds to a specific configured product in the 5RK90 reversible motor family — including the motor, gearhead type, gear ratio, and any options (terminal type, shaft configuration, voltage).

The 5RK90 designation on the motor itself identifies the core motor specification.

For exact replacement or cross-reference purposes, both the 5C3A522A00 ordering code and the motor label specification should be referenced together when sourcing.