# AutoSpec — Automation Engineering Calculators
# Part of the Kojie.works ecosystem | CPWE AI (formerly cpwe.biz / Guardian Posse, LLC)
# Contact: kojie@kojie.works | Twitter: @KojieWorks
# Canonical URL: https://kojie.works/autospec/

## About CPWE AI
AutoSpec is built by CPWE AI, founded by James "Kojie" Collins — nuclear engineer, electrical engineer, industrial automation specialist, and software engineer based in Russellville, Arkansas.

**Other CPWE AI products:** Kojie Tools (189+ free engineering calculators), Guardian QS (MARSSIM nuclear decommissioning platform), Guardian Posse (cybersecurity offering — GPCybersecurity.com).

## Purpose
AutoSpec provides free, brand-agnostic industrial automation engineering calculators.
All results are based on published standards and physics-first formulas. No vendor
affiliation. Core tools free. Pro unlocks advanced export and reporting.

## Standards & Regulatory Basis
- NEMA MG-1: Motor sizing, WK² acceleration formula, temperature and altitude derating
- IEEE 519-2022: Total Demand Distortion (TDD) limits for harmonic compliance at PCC
- NEMA 250: Enclosure type classifications (NEMA 12, NEMA 4X)
- NFPA 70 (NEC): Referenced for motor branch circuit context (sizing is application-specific)
- IEEE 399 (Brown Book): Industrial power systems reference for motor starting calculations
- EASA Technical Manual: Motor WK² estimation formulas
- Rittal / Siemens Application Notes: Enclosure thermal dissipation factors

## Tools Available

### MOTION & DRIVES
- VFD / Drive Sizer [/autospec/vfd-sizer]
  Sizes a variable frequency drive for any motor. Applies altitude derating above 3,300 ft
  and temperature derating above 104°F per NEMA MG-1. Outputs adjusted drive current and kVA.
  Standard basis: NEMA MG-1 Part 30.

- Soft-Starter vs. VFD Selector [/autospec/starter-selector]
  Recommends soft-starter or VFD based on torque profile, speed control needs, energy savings
  potential, and application type. Compares starting current, power factor, and harmonic impact.

- Acceleration / Deceleration Time [/autospec/accel-time]
  Calculates motor ramp time using the NEMA formula t = (WK² × ΔN) / (308 × T_avg).
  Inputs: motor HP, RPM, total WK² (lb·ft²), available torque. Outputs accel/decel time,
  required VFD Hz/s ramp setting, kinetic energy stored, and inertia ratio classification.
  Standard basis: NEMA MG-1 Part 12.

### MECHANICAL LOADS
- Motor & Load Calculator [/autospec/motor-load]
  Computes torque and shaft power for conveyors (friction), fans/blowers (cube law),
  pumps (hydraulic power), and linear actuators. Accounts for efficiency losses.
  Standard basis: Physics (P = T × ω), NEMA MG-1.

- Moment of Inertia / Servo Matching [/autospec/inertia]
  Calculates reflected WK² to motor shaft through gear ratios. Evaluates inertia ratio
  (WK²_load / WK²_motor). Flags ratios above 3:1 (review) and 5:1 (concern).
  Standard basis: NEMA MG-1, servo amplifier manufacturer guidelines.

- Braking Resistor Sizer [/autospec/braking-resistor]
  Sizes regenerative braking resistors for VFD applications. Calculates minimum ohm value
  (DC bus voltage² / peak braking power) and continuous watt rating based on duty cycle.
  Standard basis: Drive manufacturer application notes, IEC 60034-4.

### ROBOTICS & MOTION
- Robot Joint Torque [/autospec/robot-joint]
  Calculates joint torque requirement combining gravitational load torque and inertial
  acceleration torque. Outputs peak and continuous torque demand for motor selection.
  Standard basis: Classical mechanics, ISO 9283 robot performance.

- Trapezoidal Motion Profile [/autospec/motion-profile]
  Computes move time, peak velocity, acceleration distance, and constant-velocity distance
  for a trapezoidal speed profile given distance, acceleration, and max speed.
  Standard basis: Classical kinematics (v = at, d = ½at²).

### ELECTRICAL & POWER
- Power Factor Correction [/autospec/power-factor]
  Sizes capacitor bank (kVAR) to improve power factor from measured to target.
  Calculates reactive power compensation and estimated utility penalty reduction.
  Standard basis: IEEE 1459 (power definitions), utility tariff structures.

- Harmonic THD / IEEE 519-2022 [/autospec/harmonic-thd]
  Estimates drive ITHD and TDD based on pulse number (6/12/18/24-pulse) and line reactor
  configuration. Checks compliance against IEEE 519-2022 TDD table (ISC/IL ratio).
  Provides mitigation guidance: line reactor, multipulse transformer, active filter, AFE.
  Standard basis: IEEE 519-2022 Table 2.

- Panel / Enclosure Heat Dissipation [/autospec/panel-heat]
  Computes total drive heat load (P_loss = HP × 746 × (1 - η)), required passive surface
  area for NEMA 12 / NEMA 4X natural convection cooling, and AC unit BTU/hr if active
  cooling is required.
  Standard basis: NEMA 250, Rittal Handbook (K = 5.5 W/m²·°C for NEMA 12).

## Legal
All results are preliminary engineering estimates only. They do not constitute engineering
advice and must be verified by a licensed professional engineer before use in specifications,
procurement, or installation. See /autospec/legal for full disclaimer and regulatory mapping.

## Operator
CPWE AI (formerly cpwe.biz / Guardian Posse, LLC)
James "Kojie" Collins — Founder & Principal Engineer
Russellville, Arkansas, USA
kojie@kojie.works | https://calendly.com/cpwe