Induction Motor Slip & Speed Calculator implementation

Binding contract

This record describes what an executable surface must bind and validate. It does not claim that a public calculator, package, or production route is deployed.

Record owner

Guth Instruments

Lifecycle

verified-clean

Evidence ID

t4-078

Effect

Computation or source lookup only

Input and validation requirements

A zero pole count produces division by zero in the synchronous-speed formula, so the calculator must reject that input. The specification does not state validation behavior, creating a potential undefined, Infinity, or NaN result.

Required corrections

No binding erratum is attached to this unique-name record. Implementers must still preserve the declared units, domain, and failure behavior.

Inspectable interface fixture

The sample below is evidence for interface and validation tests, not a production implementation.

{
  "inputs": {
    "frequency_Hz": 50,
    "pole_count": 4,
    "rotor_speed_rpm": 1440
  },
  "expected_outputs": {
    "Ns_rpm": 1500,
    "slip_percent": 4,
    "rotor_frequency_Hz": 2
  },
  "working": "Ns = 120×50÷4 = 6000÷4 = 1500 rpm. Slip fraction = (1500−1440)÷1500 = 60÷1500 = 0.04. Slip percent = 0.04×100 = 4%. Rotor frequency = 0.04×50 = 2 Hz."
}

Other records

Sources and evidence

These pointers bind the page to evidence. They do not grant authority or collapse verification into deployment.

• VERIFIED_LEDGER.json
• evidence-tranche4/tranche4-results.json