One Pump Drive for PMSM and Induction Motors: Understanding the YS820

The Ausenist YS820 can be configured for two important pump-motor categories: conventional asynchronous induction motors and permanent-magnet synchronous motors. Its parameter structure provides V/F control for asynchronous motors and synchronous-motor vector control for compatible PMSM applications.

This flexibility helps pump manufacturers manage product families that use different motor technologies, but it does not mean one parameter set works for every motor.

What Must Change Between Motor Types?

The selected motor-control method must match the installed motor. Rated power, current and speed must be entered from the nameplate. PMSM commissioning may also require motor identification and electrical parameters such as stator resistance and d-axis and q-axis inductance.

Using incorrect data can cause poor starting, unstable operation, excess current or a motor-tuning fault.

Buyer Comparison

Decision	Induction motor	PMSM
YS820 control choice	V/F control	Synchronous vector control
Required base data	Power, voltage, current, speed	Power, voltage, current, speed plus motor-specific data
Commissioning focus	Rotation, current and pump duty	Correct identification and motor parameters as well as pump duty
OEM value	Familiar, widely available motor package	Supports modern permanent-magnet pump designs

The motor manufacturer should provide a complete data sheet when the nameplate does not contain the parameters required by the drive.

Pump Functions Remain Application-Specific

Motor compatibility is only one part of the system. The YS820 also needs correct pressure feedback, target pressure, sleep behavior, water-shortage detection and any multi-pump roles. A successful bench test should include the real motor, pump, sensor and intended operating sequence.

OEM/ODM Opportunity

A pump manufacturer using both motor types can discuss a controlled family of YS820 configurations with Ausenist. Customization may include branding, labels, packaging, parameter preparation and system matching. Each pump model should have a traceable drive configuration rather than a generic setting copied across the full range.

What to Send for Evaluation

Provide motor data sheets, pump curves, supply voltage, target pressure, sensor details, expected quantity and target markets. For PMSM projects, include all available motor electrical parameters and the manufacturer's tuning guidance.

Why Motor Identification Is Different for PMSM

Permanent-magnet motors can have electrical characteristics that are not obvious from kW alone. The YS820 parameter list includes stator resistance and d-axis and q-axis inductance because vector control depends on a credible motor model. Obtain these values from the motor supplier or follow the approved identification procedure.

Static and Dynamic Recognition

The manual provides motor self-learning choices. Whether the pump can be uncoupled or safely rotated affects the permitted method. Never initiate dynamic recognition when the hydraulic or mechanical system cannot tolerate rotation. The commissioning procedure should state isolation, valve and personnel-safety requirements.

Induction-Motor Commissioning

For an asynchronous motor, confirm V/F control, rated current, speed and rotation. Observe current across the pump's normal duty. Incorrect motor data may weaken protection or create nuisance trips even if the pump appears to run.

Standardize Motor Data for OEM Production

Ask motor suppliers for controlled data sheets, not values copied from an email. Link the approved motor revision to the YS820 parameter set. If winding design or magnets change, repeat validation before using the previous configuration.

Compare the Complete Pump Package

PMSM may offer advantages in a purpose-designed pump, but performance should be evaluated as a complete system. Compare input energy, delivered flow and pressure, temperature, noise and stability over the actual load profile. Avoid claiming a fixed efficiency gain without a defined test.

Buyer FAQ

Can the YS820 detect the motor type automatically? The correct control method and motor data still need to be selected and verified.

Can one physical drive be moved between PMSM and induction pumps? It may support both control methods, but parameters and rating must be changed and approved for the connected motor.

From VFD Manufacturer to Water-Control Specialist

A credible inverter expert explains the complete control loop. Electrical power is converted into controlled motor speed; the pump converts that speed into flow and head; the sensor reports pressure; and PID adjusts the next command. A problem in any link can appear to the user as a “VFD problem.”

Ausenist uses the YS620 and YS820 to address this complete chain. Model selection checks voltage and current, while application review covers pump capability, sensor quality, sleep behavior, water-shortage response and multi-pump roles. The objective is stable operation that can be commissioned and serviced logically.

This expertise is particularly useful to distributors. Instead of competing only on price, they can collect the right project data, explain functions accurately and send the factory a structured support case. That improves buyer confidence and protects the reputation of the pump package.

A Professional VFD Selection Method

Begin with the incoming supply and motor nameplate, then check the drive's rated output current. Confirm the pump curve at the intended speed and identify the minimum and maximum system demand. Next, select the pressure sensor and decide where it will be installed. Only after these items are known should the target pressure, sleep logic and protection thresholds be proposed.

An expert review also looks for hidden constraints: voltage drop on long motor cables, high ambient temperature, altitude, rapid demand changes, check-valve behavior and the possibility of the pump operating outside its recommended range. These details can change the correct drive rating or commissioning plan.

The final recommendation should state assumptions. If flow, head or motor current is missing, the quotation should identify the data still required instead of presenting a guess as a confirmed selection.

Create a Technical RFQ, Not Only a Price Request

A useful request for quotation states the problem the pump system must solve. Include minimum and peak flow, pressure or head, water source, motor data, grid, sensor and control sequence. If replacing an existing drive, add its model, fault history and photographs of the installation.

International buyers should identify destination, voltage tolerance, frequency, language and required certification. For private label, provide the product matrix and forecast rather than one logo. Ausenist can then evaluate whether the requirement is standard YS620/YS820 supply, parameter preparation or engineering customization.

Review the answer for technical completeness. It should identify the proposed model and rating, assumptions, required accessories, commissioning responsibilities and unresolved questions. This makes quotations comparable and reduces later scope disputes.

Evidence of Specialist Support

Look for a logical selection form, model-specific wiring information, parameter records and a fault-data checklist. These tools show that the supplier understands how pumps, motors and VFD control interact after the sale.

Turn Each Project Into Reusable Engineering Knowledge

After commissioning, document what was selected and why. Store the pump curve, motor data, sensor, pressure target, key protection values and observed results. Note any site condition that changed the original plan. This project record supports faster and safer selection when a similar request arrives.

For distributors, a small library of verified applications is more valuable than broad unsupported claims. It allows sales teams to discuss real engineering conditions while protecting confidential customer information. It also shows where a new project requires factory review.

Ausenist's YS620 and YS820 content should follow the same principle: explain operating conditions, avoid invented performance numbers and invite buyers to submit the data needed for a confirmed solution.