Rotor HUB, Stator Retaining Ring | Generac Power Systems 940-2

Section 1.2

MAJOR GENERATOR COMPONENTS

ROTOR HUB

See Figure 2 on previous page. The Rotor Hub is bal- anced with the Rotor and must be replaced with the Rotor as an assembly. Part of the engine ignition sys- tem is pressed onto the Hub and can be replaced only as part of the Rotor and Hub assembly.

STATOR RETAINING RING

The Stator Retaining Ring is made of die-cast alu- minum. Four hex head capscrews with lockwashers pass through holes in the Retaining Ring, to retain the Stator Assembly to the Stator Adapter (Item 7, Figure 1).

STEPPER MOTOR

The Stepper Motor (Figure 3) consists of a stepper motor along with a gear and cam arrangement which allows motor movement to change the engine carbu- retor throttle setting. The Motor is controlled by output signals from the Computer Control Circuit Board, which calculates the number of steps the stepper needs to take and generates the required signals to the Motor. The circuit board signals the Motor to actu- ate in response to changes in AC output voltage. Thus, in response to decreasing AC output voltages, the Motor will increase the throttle setting and engine speed will increase. Conversely, Increasing AC out- put voltages will cause the Motor to decrease throttle setting and engine speed will decrease.

STATOR ASSEMBLY

The 2-phase Stator is made up of six (6) windings, with leads brought out as shown in figure 4. Figure 5 is a schematic representation of each stator winding. Note that there are two (2) power phase windings (Leads AC1, AC2, SL1 and SL2 ); a timing winding (Leads TIM1 and TIM2); a power supply winding (Leads PSI, PS2); and a dual battery charge winding (Leads 55, 66, 77).

STATOR ADAPTER

The Adapter is retained to the engine by means of four hex head capscrews. The Stator is retained to the Stator Adapter and is "sandwiched" between the Adapter and the Stator Retaining Ring.

LOWER FAN & FLYWHEEL

The Lower Fan and Flywheel are retained to the engine PTO shaft by means of a conical washer and an M16-1.50 hex nut. When assembling, tighten the flywheel nut to 75 foot-pounds.

Figure 3. The Stepper Motor

ENGINE

The engine is a single cylinder, 220 cc, overhead valve type manufactured by Generac® Power Systems, Inc.

Figure 4. Stator Pictorial View

Page 1.2-2

941-2, 940-2 specifications

Generac Power Systems has established a strong reputation in the field of backup power solutions, particularly with its innovative products like the Generac 940-2 and 941-2 generator systems. These generators are designed to provide reliable power during emergencies, ensuring that homes and businesses can maintain operations seamlessly when grid power is disrupted.

One of the standout features of the Generac 940-2 and 941-2 models is their robust engine performance. Both generators utilize Generac’s patented engines, known for their durability and efficiency. These engines are built to withstand the most demanding conditions while providing a consistent power output. This reliability is crucial for users who depend on uninterrupted power supply for essential appliances and equipment.

In terms of technologies, the Generac 940-2 and 941-2 are equipped with advanced automatic transfer switch capabilities. This technology allows the generators to automatically start and supply power within seconds of an outage. This quick response time helps to ensure that critical systems remain operational without noticeable interruptions, which is vital for businesses and households alike.

Another important characteristic of these models is their user-friendly interface. The generators come with an intuitive digital controller that provides real-time information on power usage, system status, and maintenance needs. This technology makes it easy for users to monitor their generators and ensure they are always ready for an emergency.

The design of the Generac 940-2 and 941-2 also emphasizes noise reduction and aesthetic appeal. These units are engineered for quieter operation compared to traditional generators, making them suitable for residential areas. Their sleek appearance also fits well with modern home exteriors, enhancing rather than detracting from the property’s visual appeal.

Furthermore, these generators offer flexible fuel options, with the ability to run on natural gas or propane. This versatility allows users to choose the fuel source that best meets their needs, contributing to energy efficiency and lowering overall operating costs.

In summary, the Generac Power Systems 940-2 and 941-2 are exceptional generators that combine powerful performance with innovative technologies. Their automatic transfer switch capabilities, user-friendly controls, noise reduction features, and flexible fuel options make them an excellent choice for anyone seeking reliable backup power solutions. With these generators, users can rest assured knowing they have a dependable energy source ready when they need it most.

Generac Power Systems 940-2 Rotor HUB, Stator Retaining Ring, Stepper Motor, Stator Assembly

Models: 941-2 940-2